Dr Christopher Leonardi
Lecturer in Mining Engineering
Geotechnical Engineering Centre
Associate Professor
School of Mechanical and Mining Engineering
+61 7 336 53761
Researcher biography
Biography:
Christopher Leonardi is an Associate Professor within the School of Mechanical and Mining Engineering and an Advance Queensland Industry Research Fellow (Mid-Career). Dr Leonardi completed his PhD in computational mechanics at The University of Wales, Swansea, and his BE(Hons) in mechanical engineering at James Cook University, where he graduated with First Class Honours and a University Medal. Christopher's PhD thesis resulted in the development of a computational approach to modelling complex fluid-particle suspensions and demonstrated its application in the context of underground mining. Prior to joining UQ, Christopher spent three years as a postdoctoral research fellow in the Department of Civil and Environmental Engineering at the Massachusetts Institute of Technology, where he worked on computational modelling of fluid-solid interaction problems in the context of oil and gas production.
Dr Leonardi has published more than 40 scientific papers in international journals, 30 conference papers (most in collaboration with industry partners), and one book chapter. He has graduated four PhD students as principal advisor and a further three as associate advisor. In addition to his academic pursuits, Christopher spent five years working as an engineering consultant with Rockfield Technologies Australia, where he applied advanced computational analysis tools to problems in bulk materials handling, structural design, and geomechanics.
Research:
Associate Professor Leonardi's research is focused on the development and application of computational models of complex fluid-solid interactions, including suspension transport, porous media flow, multiphase flows, and poromechanics. The outputs of his work are applied to provide insight into the complex characteristics of subsurface fluid and solid mechanics in gas production from unconventional reservoirs (e.g. coal seams) and mineral extraction from challenging orebodies. Current and recent projects include studies on hydraulic fracturing and proppant transport in coal seam gas (CSG) reservoirs, surface movement within and adjacent to CSG tenements, counter-current two-phase flow in CSG wells, in situ recovery of minerals from low-permeability rocks, and bubble-particle interaction in hydrogen formation via methane pyrolysis.
Christopher and his group of postdoctoral researchers and postgraduate students possess expertise in a range of computational techniques, including the lattice Boltzmann, discrete element, finite element, and finite difference methods. His team collaborates closely with national computing facilities, such as Pawsey Supercomputing Centre, to development, implement, and apply these techniques to large-scale engineering problems.
Teaching and Learning:
Associate Professor Leonardi is Director of Teaching and Learning in the School of Mechanical and Mining Engineering where he coordinates and lectures the course, MECH3780 Computational Mechanics, and lectures the first-year course, ENGG1001 Programming for Engineers. Christopher was awarded a Graduate Certificate in Higher Education from UQ in 2015 and received Citations for Outstanding Contributions to Student Learning from the Australian Awards for University Teaching (AAUT) in 2019 and UQ in 2018.
Book Chapter
Owen, D. R. J., Feng, Y. T., Han, K. and Leonardi, C. R. (2011). Multi-field coupling strategies for large scale particle-fluid problems. Recent Developments and Innovative Applications in Computational Mechanics. (pp. 239-248) edited by Dana Mueller-Hoeppe, Stefan Loehnert and Stefanie Reese. Berlin Heidelberg, Germany: Springer - Verlag. doi: 10.1007/978-3-642-17484-1_27
Journal Articles
Holzer, Markus, Mitchell, Travis R., Leonardi, Christopher R. and Rüde, Ulrich (2024). Development of a central-moment phase-field lattice Boltzmann model for thermocapillary flows: Droplet capture and computational performance. Journal of Computational Physics, 518 113337, 113337. doi: 10.1016/j.jcp.2024.113337
Okajima, Ryota, Mitchell, Travis R., Leonardi, Christopher R. and Smart, Simon (2024). Hydrodynamics of molten media bubble columns for hydrogen production through methane pyrolysis. Physics of Fluids, 36 (10) 103347. doi: 10.1063/5.0227299
Abraham, Jijo Derick, Shavik, Sheikh Mohammad, Mitchell, Travis R., Lee, Lik Chuan, Ray, Bahni and Leonardi, Christopher R. (2024). Computational investigation of the role of ventricular remodelling in HFpEF: The key to phenotype dissection. Computers in Biology and Medicine, 180 109019, 109019. doi: 10.1016/j.compbiomed.2024.109019
Mojumder, Juwel C., Aminossadati, Saiied M. and Leonardi, Christopher R. (2024). Numerical analysis of a hybrid SF-CPV/T collector using spectral-filter nanofluids suitable for a high operating temperature range. Renewable Energy, 230 120735, 120735. doi: 10.1016/j.renene.2024.120735
Bhardwaj, Utsav, Ray, Bahni, Das, Dipayan, Mitchell, Travis R., Das, Apurba and Leonardi, Christopher R. (2024). Contextual existence of an optimum through-plane orientation and aspect ratio of a fiber-segment in fibrous air filters. Physics of Fluids, 36 (3) 033348, 1-20. doi: 10.1063/5.0192443
Mojumder, Juwel C., Mitchell, Travis, Aminossadati, Saiied M. and Leonardi, Christopher R. (2024). Numerical investigation of the effect of nanoparticle aggregation on the performance of concentrated photovoltaic-solar thermal collectors with spectral filtering. Applied Thermal Engineering, 239 121944, 1-17. doi: 10.1016/j.applthermaleng.2023.121944
López, Paulo, Mitchel, Travis, Leonardi, Christopher and Onederra, Italo (2023). Assessment of capillary rise in rocks by Time Lapse Digital Imaging. Minerals Engineering, 204 108434, 108434. doi: 10.1016/j.mineng.2023.108434
López, Paulo, Araos, Miguel, Leonardi, Christopher and Onederra, Italo (2023). An experimental investigation of the fluid accessibility of preconditioned sulphide copper ores. Minerals Engineering, 200 108142, 1-14. doi: 10.1016/j.mineng.2023.108142
Brennand, Sarah, Hayes, Phil and Leonardi, Christopher (2023). The complexity of identifying and quantifying natural and anthropogenic influences on surface movement in coal seam gas producing regions within the Surat Basin, Queensland. The APPEA Journal, 63 (1), 127-143. doi: 10.1071/aj22143
Di Vaira, Nathan J., Łaniewski-Wołłk, Łukasz, Johnson, Raymond L., Aminossadati, Saiied M. and Leonardi, Christopher R. (2023). Hydrodynamic clogging of micro-particles in planar channels under electrostatic forces. Journal of Fluid Mechanics, 960 A34. doi: 10.1017/jfm.2023.214
Roslin, A., Marsh, M., Provencher, B., Mitchell, T. R., Onederra, I. A. and Leonardi, C. R. (2023). Processing of micro-CT images of granodiorite rock samples using convolutional neural networks (CNN), Part II: Semantic segmentation using a 2.5D CNN. Minerals Engineering, 195 108027, 108027. doi: 10.1016/j.mineng.2023.108027
Roslin, A., Lebedev, M., Mitchell, T.R., Onederra, I.A. and Leonardi, C.R. (2023). Processing of micro-CT images of granodiorite rock samples using convolutional neural networks (CNN). Part III: Enhancement of Scanco micro-CT images of granodiorite rocks using a 3D convolutional neural network super-resolution algorithm. Minerals Engineering, 195 108028, 1-10. doi: 10.1016/j.mineng.2023.108028
Mojumder, Juwel C., Aminossadati, Saiied M. and Leonardi, Christopher R. (2023). Performance analysis of a concentrated direct absorption solar collector (DASC) with nanofluids using computational fluid dynamics and discrete ordinates radiation modelling (CFD-DORM). Renewable Energy, 205, 30-52. doi: 10.1016/j.renene.2023.01.066
Aziz, Mohammad Abdul, Aminossadati, Saiied M. and Leonardi, Christopher (2023). Performance analysis of magnetorheological plastomer dampers with different annular shear gaps. Journal of Magnetism and Magnetic Materials, 568 170396. doi: 10.1016/j.jmmm.2023.170396
Mitchell, T. R., Wang, Z., Araos, M., Leonardi, C. R., Gefken, P. R. and Onederra, I. A. (2023). Experimental and numerical investigation into the fracture patterns induced by blast-loading under unconfined and confined conditions. Rock Mechanics and Rock Engineering, 56 (4), 2433-2455. doi: 10.1007/s00603-022-03195-x
Mitchell, T. R., Roslin, A., Łaniewski-Wołłk, , Onederra, I. and Leonardi, C. R. (2023). Quantifying the permeability enhancement from blast-induced microfractures in porphyry rocks using a cumulant lattice Boltzmann method. Transport in Porous Media, 146 (3), 587-615. doi: 10.1007/s11242-022-01875-4
Roslin, A., Marsh, M., Piché, N., Provencher, B., Mitchell, T. R., Onederra, I. A. and Leonardi, C. R. (2022). Processing of micro-CT images of granodiorite rock samples using convolutional neural networks (CNN), Part I: Super-resolution enhancement using a 3D CNN. Minerals Engineering, 188 107748, 107748. doi: 10.1016/j.mineng.2022.107748
Mojumder, Juwel C., Aminossadati, Saiied M. and Leonardi, Christopher R. (2022). Comparative performance analysis of a SF-CPV/T collector under Australian climatic conditions using CFD and radiation modelling techniques. Energy and Buildings, 271 112297, 1-20. doi: 10.1016/j.enbuild.2022.112297
Zhong, Ruizhi, Mitchell, Travis, Johnson Jr., Raymond and Leonardi, Christopher (2022). Efficient implicit methods for wellbore shear failure analysis during drilling and production in coalbeds. International Journal of Rock Mechanics and Mining Sciences, 155 105129, 105129. doi: 10.1016/j.ijrmms.2022.105129
Abdul Aziz, Mohammad, Aminossadati, Saiied M. and Leonardi, Christopher (2022). Load response of magnetorheological (MR) plastomer dampers under applied magnetic fields. Journal of Magnetism and Magnetic Materials, 547 168930, 1-10. doi: 10.1016/j.jmmm.2021.168930
Masoudian, Mohsen S., Chen, Zhongwei and Leonardi, Christopher (2022). Poroelastic solution of a wellbore in a swelling rock with non-hydrostatic stress field. Journal of Rock Mechanics and Geotechnical Engineering, 14 (2), 303-314. doi: 10.1016/j.jrmge.2021.05.003
Di Vaira, Nathan J., Łaniewski-Wołłk, Łukasz, Johnson, Raymond L., Aminossadati, Saiied M. and Leonardi, Christopher R. (2022). Influence of particle polydispersity on bulk migration and size segregation in channel flows. Journal of Fluid Mechanics, 939 A30. doi: 10.1017/jfm.2022.166
McCullough, J. W.S., Łaniewski-Wołłk, , Aminossadati, S. M. and Leonardi, C. R. (2021). A 3D LBM-DEM study of sheared particle suspensions under the influence of temperature-dependent viscosity. Powder Technology, 390, 143-158. doi: 10.1016/j.powtec.2021.05.011
Mitchell, T., Holzer, M., Schwarzmeier, C., Bauer, M., Rüde, U. and Leonardi, C. (2021). Stability assessment of the phase-field lattice Boltzmann model and its application to Taylor bubbles in annular piping geometries. Physics of Fluids, 33 (8) 083325, 1-22. doi: 10.1063/5.0061694
Hill, Bryce M. and Leonardi, Christopher R. (2021). Lattice Boltzmann simulation of transient blood flow in arterial geometries using a regularised, viscoplastic and shear-thinning fluid. International Journal for Numerical Methods in Biomedical Engineering, 37 (8) e3456, 1-28. doi: 10.1002/cnm.3456
Mitchell, T. R., Majidi, M., Rahimian, M. H. and Leonardi, C. R. (2021). Computational modeling of three-dimensional thermocapillary flow of recalcitrant bubbles using a coupled lattice Boltzmann-finite difference method. Physics of Fluids, 33 (3) 032108, 1-23. doi: 10.1063/5.0038171
Wang, Duo, You, Zhenjiang, Johnson, Raymond L., Wu, Lei, Bedrikovetsky, Pavel, Aminossadati, Saiied M. and Leonardi, Christopher R. (2021). Numerical investigation of the effects of proppant embedment on fracture permeability and well production in Queensland coal seam gas reservoirs. International Journal of Coal Geology, 242 103689, 103689. doi: 10.1016/j.coal.2021.103689
Masum, Billah M., Aminossadati, Saiied M., Leonardi, Christopher R. and Kizil, Mehmet S. (2020). Gas sensing with hollow-core photonic crystal fibres: a comparative study of mode analysis and gas flow performance. Photonics and Nanostructures - Fundamentals and Applications, 41 100830, 100830. doi: 10.1016/j.photonics.2020.100830
Mitchell, T. and Leonardi, C. (2020). On the rise characteristics of Taylor bubbles in annular piping. International Journal of Multiphase Flow, 130 103376, 103376. doi: 10.1016/j.ijmultiphaseflow.2020.103376
Kamyar, Amin, Aminossadati, Saiied M., Leonardi, Christopher R., Sasmito, Agus P. and Poncet, Sébastien (2020). Flow characterisation of monopropylene glycol ice slurry through a horizontal U-bend: a numerical approach. European Journal of Mechanics, B/Fluids, 82, 93-105. doi: 10.1016/j.euromechflu.2020.03.004
Mitchell, T. and Leonardi, C. (2020). Development of closure relations for the motion of Taylor bubbles in vertical and inclined annular pipes using high-fidelity numerical modeling. Physics of Fluids, 32 (6) 063306, 063306. doi: 10.1063/5.0011456
Rutkowski, Mariusz, Gryglas, Wojciech, Szumbarski, Jacek, Leonardi, Christopher and Łaniewski-Wołłk, Łukasz (2020). Open-loop optimal control of a flapping wing using an adjoint Lattice Boltzmann method. Computers and Mathematics with Applications, 79 (12), 3547-3569. doi: 10.1016/j.camwa.2020.02.020
McCullough, J. W.S., Aminossadati, S. M. and Leonardi, C. R. (2020). Transport of particles suspended within a temperature-dependent viscosity fluid using coupled LBM–DEM. International Journal of Heat and Mass Transfer, 149 119159, 119159. doi: 10.1016/j.ijheatmasstransfer.2019.119159
Gruszczyński, G., Mitchell, T., Leonardi, C., Łaniewski-Wołłk, Ł. and Barber, T. (2019). A cascaded phase-field lattice Boltzmann model for the simulation of incompressible, immiscible fluids with high density contrast. Computers & Mathematics with Applications, 79 (4), 1049-1071. doi: 10.1016/j.camwa.2019.08.018
Masoudian, Mohsen S., Leonardi, Christopher, Chen, Zhongwei and Underschultz, Jim (2019). Towards the development of a baseline for surface movement in the Surat Cumulative Management Area. The APPEA Journal, 59 (1), 95-114. doi: 10.1071/aj18181
Aghighi, Mohammad Ali, Johnson, Raymond Jr. and Leonardi, Chris (2019). Challenges in modelling of hydraulic fracturing in low-permeability coal seams with complex cleat networks and stress regimes. APPEA Journal, 59 (1), 166-178. doi: 10.1071/aj18140
You, Zhenjiang, Wang, Duo, Leonardi, Christopher, Johnson Jr, Raymond and Bedrikovetsky, Pavel (2019). Influence of elastoplastic embedment on CSG production enhancement using graded particle injection. The APPEA Journal, 59 (1), 310-318. doi: 10.1071/aj18086
Masum, Billah M., Aminossadati, Saiied M., Kizil, Mehmet S. and Leonardi, Christopher R. (2019). Numerical and experimental investigations of pressure-driven gas flow in hollow-core photonic crystal fibers. Applied Optics, 58 (4), 963-972. doi: 10.1364/ao.58.000963
Kamyar, Amin, Aminossadati, Saiied M. and Leonardi, Christopher R. (2019). Thermo-Hydrodynamics of a Helical Coil Heat Exchanger Operated with a Phase-Change Ice Slurry as a Refrigerant. Heat Transfer Engineering, 40 (3-4), 283-294. doi: 10.1080/01457632.2018.1428989
Masum, B. M., Aminossadati, S. M., Leonardi, C. R., Kizil, M. S. and Amanzadeh, M. (2018). Numerical analysis of gas diffusion in drilled hollow–core photonic crystal fibres. Measurement, 127, 283-291. doi: 10.1016/j.measurement.2018.05.106
Wang, Duo, Leonardi, Christopher and Aminossadati, Saiied M. (2018). Improved coupling of time integration and hydrodynamic interaction in particle suspensions using the lattice Boltzmann and discrete element methods. Computers and Mathematics with Applications, 75 (7), 2593-2606. doi: 10.1016/j.camwa.2018.01.002
McCullough, J. W.S., Leonardi, C. R., Jones, B. D., Aminossadati, S. M. and Williams, J. R. (2018). Investigation of local and non-local lattice Boltzmann models for transient heat transfer between non-stationary, disparate media. Computers and Mathematics with Applications, 79 (1), 174-194. doi: 10.1016/j.camwa.2018.01.018
Mitchell, T., Leonardi, C. and Fakhari, A. (2018). Development of a three-dimensional phase-field lattice Boltzmann method for the study of immiscible fluids at high density ratios. International Journal of Multiphase Flow, 107, 1-15. doi: 10.1016/j.ijmultiphaseflow.2018.05.004
Fakhari, Abbas, Mitchell, Travis, Leonardi, Christopher and Bolster, Diogo (2017). Improved locality of the phase-field lattice-Boltzmann model for immiscible fluids at high density ratios. Physical Review E, 96 (5) 053301, 053301. doi: 10.1103/PhysRevE.96.053301
Wu, Benjamin, Firouzi, Mahshid, Mitchell, Travis, Rufford, Thomas E., Leonardi, Christopher and Towler, Brian (2017). A critical review of flow maps for gas-liquid flows in vertical pipes and annuli. Chemical Engineering Journal, 326, 350-377. doi: 10.1016/j.cej.2017.05.135
Kamyar, Amin, Aminossadati, Saiied M. and Leonardi, Christopher (2017). Potential strategies towards energy-efficient mine ventilation and cooling systems. Australian Resources and Investment, 11 (1), 49-50.
McCullough, J. W. S., Leonardi, C. R., Jones, B. D., Aminossadati, S. M. and Williams, J. R. (2016). Lattice Boltzmann methods for the simulation of heat transfer in particle suspensions. International Journal of Heat and Fluid Flow, 62 (Part B), 150-165. doi: 10.1016/j.ijheatfluidflow.2016.11.005
Mitchell, Travis R. and Leonardi, Christopher R. (2016). Micromechanical investigation of fines liberation and transport during coal seam dewatering. Journal of Natural Gas Science and Engineering, 35 (A), 1101-1120. doi: 10.1016/j.jngse.2016.09.038
Leonardi, Christopher R. (2016). Foreword: Special issue on particle methods for the oil and gas industry. Computational Particle Mechanics, 3 (2), 123-124. doi: 10.1007/s40571-016-0107-6
Butler, J. L. and Leonardi, C. R. (2016). Improvement of squeezing ground prediction and monitoring capabilities for Mount Isa Mines Northern 3500 orebody. Mining Technology: Transactions of the Institutions of Mining and Metallurgy: Section A, 125 (3), 142-155. doi: 10.1080/14749009.2015.1117238
Liu, Haihu, Kang, Qinjun, Leonardi, Christopher R., Jones, Bruce D., Schmieschek, Sebastian, Narvaez, Ariel, Williams, John R., Valocchi, Albert J. and Harting, Jens (2015). Multiphase lattice Boltzmann simulations for porous media applications: a review. Computational Geosciences, 20 (4), 1-29. doi: 10.1007/s10596-015-9542-3
Leonardi, Christopher R., McCullough, Jon W. S., Jones, Bruce D. and Williams, John R. (2015). Electromagnetic excitation of particle suspensions in hydraulic fractures using a coupled lattice Boltzmann-discrete element model. Computational Particle Mechanics, 3 (2), 125-140. doi: 10.1007/s40571-015-0035-x
Holmes, David W., Williams, John R., Tilke, Peter G. and Leonardi, Christopher (2015). Characterizing flow in oil reservoir rock using SPH: absolute permeability. Computational Particle Mechanics, 3 (2), 141-154. doi: 10.1007/s40571-015-0038-7
Leonardi, C. R., Owen, D. R. J. and Feng, Y. T. (2012). Simulation of fines migration using a non-Newtonian lattice Boltzmann-discrete element model Part II: 3D extension and applications. Engineering Computations, 29 (3-4), 392-418. doi: 10.1108/02644401211227635
Leonardi, C. R., Owen, D. R. J. and Feng, Y. T. (2012). Simulation of fines migration using a non-Newtonian lattice Boltzmann-discrete element model Part I: 2D implementation aspects. Engineering Computations, 29 (3-4), 366-391. doi: 10.1108/02644401211227617
Leonardi, C. R., Owen, D. R. J. and Feng, Y. T. (2011). Numerical rheometry of bulk materials using a power law fluid and the lattice Boltzmann method. Journal of Non-Newtonian Fluid Mechanics, 166 (12-13), 628-638. doi: 10.1016/j.jnnfm.2011.02.011
Owen, D. R. J., Leonardi, C. R. and Feng, Y. T. (2011). An efficient framework for fluid–structure interaction using the lattice Boltzmann method and immersed moving boundaries. International Journal for Numerical Methods in Engineering, 87 (1-5), 66-95. doi: 10.1002/nme.2985
Conference Papers
Sadeghi, Sadegh, Aminossadati, Saiied M., Kizil, Mehmet and Leonardi, Christopher (2024). Steady-state CFD Simulation of Airflow Around Rotating Cutting Drums in Longwall Mining. Green Mining Conference 2024, Wollongong, NSW Australia, 1-3 October 2024. Wollongong, NSW Australia: University of Wollongong.
Sadeghi, Sadegh, Aminossadati, Saiied M., Kizil, Mehmet and Leonardi, Christopher (2024). Numerical Study of Airflow Dynamics in Longwall Mining: Impacts of Ventilation Air Humidity Level and Shearer Movement. Green Mining Conference 2024, Wollongong, NSW Australia, 1-3 October 2024. Wollongong, NSW Australia: University of Wollongong.
Leonardi, C. R., Laniewski-Wollk, L. and Di Vaira, N. J. (2024). Quantifying non-API proppant transport and fracture permeability as a function of solids loading and particle shape. 58th U.S. Rock Mechanics/Geomechanics Symposium, Golden, CO, United States, 23-26 June 2024. ARMA. doi: 10.56952/arma-2024-0718
Shi, Zhang, Huang, Yixiao, Flottman, Thomas, Leonardi, Christopher, Lu, Mingyuan and Chen, Zhongwei (2023). Characterization of Anisotropic Geomechanical Properties of Australian Bowen Basin Coals Through Nanoindentation and Upscaling Approaches. Asia Pacific Unconventional Resources Symposium APUR 2023, Brisbane, QLD Australia, 14–15 November 2023. Richardson, TX United States: Society of Petroleum Engineers. doi: 10.2118/217274-MS
Santiago, V., Rodger, I., Hayes, P., Leonardi, C. and Deisman, N. (2023). Understanding compressibility coefficients in heterogeneous fractured rocks and implications for CSG reservoir simulation. Asia Pacific Unconventional Resources Symposium, Brisbane, QLD Australia, 14-15 November 2023. Richardson, TX USA: Society of Petroleum Engineers. doi: 10.2118/217281-MS
Leonardi, Christopher R., Di Vaira, Nathan J., Laniewski-Wollk, Lukasz, Ganpule, Sameer and Flottmann, Thomas (2023). Computational analysis of proppant transport and screen-out in natural and induced fractures. Asia Pacific Unconventional Resources Symposium, Brisbane, QLD, Australia, 14-15 November 2023. Richardson, TX, United States: Society of Petroleum Engineers. doi: 10.2118/217348-ms
Mitchell, T., Sashko, D., Łaniewski-Wołłk, Ł. and Leonardi, C. (2023). Towards a statistical framework to upscale fracture flows with quantifiable uncertainty. 2nd EAGE Workshop on Fluid Flow in Faults and Fracture - Modelling, Uncertainty and Risk, Canberra, ACT Australia, 15-16 August 2023. Bunnik, Netherlands: European Association of Geoscientists & Engineers. doi: 10.3997/2214-4609.202373012
Leonardi, Christopher R., Di Vaira, Nathan J., Laniewski-Wollk, Lukasz, Aminossadati, Saiied M. and Johnson, Raymond L. (2023). Probabilistic quantification of size segregation and screen-out of microparticles subject to electrostatic forces. SPE Hydraulic Fracturing Technology Conference and Exhibition 2023, HFTC 2023, The Woodlands, TX, United States, 31 January– 2 February 2023. Richardson, TX, United States: Society of Petroleum Engineers. doi: 10.2118/212379-ms
Ramanandraibe, H. M., Johnson, R. L., Sedaghat, M. and Leonardi, C. R. (2023). Co-application of indirect hydraulic fracturing and micro-proppants with existing surface-to-inseam wells to improve pre-drainage of low permeability coals in mining areas. ADIPEC, Abu Dhabi, UAE, 2-5 October 2023. Society of Petroleum Engineers. doi: 10.2118/216613-MS
Johnson, Raymond Leslie, Ramanandraibe, Honja Miharisoa, Di Vaira, Nathan, Leonardi, Chris, You, Zhenjiang, Santiago, Vanessa, Ribeiro, Ayrton, Badalyan, Alexander, Bedrikovetsky, Pavel, Zeinijahromi, Abbas, Carageorgos, Themis, Sanchez-Barr, Angel, Chalaturnyk, Rick and Deisman, Nathan (2022). Implications of recent research into the application of graded particles or micro-proppants for coal seam gas and shale hydraulic fracturing. SPE Asia Pacific Oil & Gas Conference and Exhibition, Adelaide, SA, Australia, 17-19 October 2022. Society of Petroleum Engineers. doi: 10.2118/210628-ms
Di Vaira, Nathan J., Łaniewski-Wołłk, Łukasz, Johnson Jr., Raymond L., Aminossadati, Saiied M. and Leonardi, Christopher R. (2021). A novel methodology for predicting micro-proppant screenout in hydraulic fracturing treatments. Asia Pacific Unconventional Resources Technology Conference, Virtual, 16–18 November 2021. Tulsa, OK, United States: Society of Exploration Geophysicists. doi: 10.15530/ap-urtec-2021-208342
Chen, Z., Mondal, S., Leonardi, C. R. and Flottmann, T. (2021). A new approach for measuring the shear strength of cleated coal. 55th U.S. Rock Mechanics/Geomechanics Symposium, Houston, TX United States, 18-25 June 2021. Alexandria, VA United States: The American Rock Mechanics Association (ARMA).
Leonardi, C. R., Zhong, R., Mitchell, T. R., Chen, Z., Johnson, R. L., O'Hagan, D. and Flottmann, T. (2021). Analytical and numerical assessment of the influence of bulk coal strength on drilling operations in unconventional coal seam gas wells. 55th US Rock Mechanics/Geomechanics Symposium, Houston, TX USA, 20-23 June 2021. Alexandria, VA USA: American Rock Mechanics Association.
Huang, Yixiao, Shi, Zhang, Flottmann, Thomas, Kuznetsov, Dan, Rudolph, Victor, Leonardi, Christopher and Chen, Zhongwei (2021). Experimental Study of Coal Directional Sorption-Induced Strain Under Different Temperatures. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Online, 16–18 November 2021. Tulsa, OK United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2021-208345
Mitchell, Travis R., Zhong, Ruizhi, Johnson, Ray and Leonardi, Christopher R. (2021). Numerical evaluation of bulk geomechanical properties of fractured coal with changing net effective stress conditions. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Virtual, 16-18 November 2021. Tulsa, OK, United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2021-208346
Zhong, Ruizhi, Leonardi, Christopher R., Mitchell, Travis R. and Johnson, Ray L. (2021). Wellbore stability analysis of horizontal drilling in Bowen and Surat coal seam gas wells. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Virtual, 16-18 November 2021. Tulsa, OK, United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2021-208399
Mitchell, Travis and Leonardi, Christopher (2020). Analysis of Taylor bubble dynamics via high-fidelity numerical modelling. 22nd Australasian Fluid Mechanics Conference AFMC2020, Brisbane, Australia, 7-10 December 2020. Brisbane, Australia: The University of Queensland. doi: 10.14264/4181c21
Di Vaira, Nathan J., Łaniewski-Wołłk, Łukasz, Johnson, Raymond L., Aminossadati, Saiied M. and Leonardi, Christopher R. (2020). Hydrodynamic and electrostatic jamming of microparticles in narrow channels. 22nd Australasian Fluid Mechanics Conference AFMC2020, Brisbane, QLD Australia, 7-10 December 2020. Brisbane, QLD Australia: The University of Queensland. doi: 10.14264/8d34dcf
Mojumder, Juwel Chandra, Aminossadati, Saiied and Leonardi, Christopher R. (2020). Modelling of selective nanofluids under radiation in a CPV/T collector. 22nd Australasian Fluid Mechanics Conference AFMC2020, Brisbane, QLD Australia, 7-10 December 2020. Brisbane, QLD Australia: The University of Queensland. doi: 10.14264/d43e050
Hill, Bryce, Mitchell, Travis and Leonardi, Christopher (2020). Lattice Boltzmann modelling of a regularised Kuang-Luo fluid in a carotid artery. 22nd Australasian Fluid Mechanics Conference AFMC2020, Brisbane, QLD Australia, 7-10 December 2020. Brisbane, QLD Australia: The University of Queensland. doi: 10.14264/cf18781
Di Vaira, Nathan, Leonardi, Christopher and Johnson, Raymond, Jr (2020). Modelling micro-proppant transport in stress-sensitive naturally-fractured reservoirs. SPE Europec (Society of Petroleum Engineers Europe Energy Conference), Virtual/Online, 1-3 December 2020. Richardson, Texas, United States: Society of Petroleum Engineers. doi: 10.2118/200600-MS
Di Vaira, Nathan, Leonardi, Christopher and Johnson Jr., Raymond (2020). Modelling Micro-Proppant Transport in Stress-Sensitive Naturally-Fractured Reservoirs. 82nd EAGE Conference and Exhibition, Amsterdam, Netherlands, 8-11 December. Richardson, TX United States: Society of Petroleum Engineers. doi: 10.2118/200600-ms
Johnson, Raymond L., You, Zhenjiang, Ribeiro, Ayrton, Mukherjee, Saswata, Salomao de Santiago, Vanessa and Leonardi, Christopher (2020). Integrating Reservoir Characterisation, Diagnostic Fracture Injection Testing, Hydraulic Fracturing and Post-Frac Well Production Data to Define Pressure Dependent Permeability Behavior in Coal. SPE Asia Pacific Oil & Gas Conference and Exhibition, Online, 17-19 November 2020. Richardson, TX United States: Society of Petroleum Engineers. doi: 10.2118/202281-ms
Laniewski-Wollk, Lukasz and Leonardi, Christopher (2020). Towards a stochastic model of the permeability of rough fractures. 22nd Australasian Fluid Mechanics Conference AFMC2020, Brisbane, QLD Australia, 7-10 December 2020. Brisbane, QLD Australia: The University of Queensland. doi: 10.14264/9d96db0
Mitchell, Travis, Hill, Bryce, Firouzi, Mahshid and Leonardi, Christopher (2019). Development and Evaluation of Multiphase Closure Models used in the Simulation of Unconventional Wellbore Dynamics. Unconventional Resources Technology Conference (URTEC), Brisbane, QLD Australia, 18 - 19 November 2019. Tulsa, OK United States: Unconventional Resources Technology Conference. doi: 10.15530/ap-urtec-2019-198239
Deisman, Nathan, Flottmann, Thomas, Guo, Yujia, Hodder, Kevin, Chalaturnyk, Richard and Leonardi, Christopher (2019). Using 3d printed synthetic rock for systematic evaluation of mechanical properties in coal. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Brisbane, QLD, Australia, 18 – 19 November 2019. Brisbane, QLD, Australia: Unconventional Resources Technology Conference (URTEC). doi: 10.15530/AP-URTEC-2019-198255
You, Zhenjiang, Wang, Duo, Di Vaira, Nathan, Johnson, Raymond, Bedrikovetsky, Pavel and Leonardi, Christopher (2019). Development of predictive models in support of micro-particle injection in naturally fractured reservoirs. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Brisbane, QLD, Australia, 18 – 19 November 2019. Brisbane, QLD, Australia: Unconventional Resources Technology Conference (URTEC). doi: 10.15530/AP-URTEC-2019-198276
Leonardi, Christopher R., Flottmann, Thomas, Pandey, Vibhas J. and Johnson, Raymond J. (2019). Quantifying the influence of three dimensionality on hydraulic fracturing in coal seam gas wells. SPE/AAPG/SEG Asia Pacific Unconventional Resources Technology Conference, Brisbane, QLD Australia, 18 – 19 November 2019. Brisbane, QLD Australia: Unconventional Resources Technology Conference (URTEC). doi: 10.15530/AP-URTEC-2019-198203
Mitchell, Travis, Leonardi, Chris, Firouzi, Mahshid and Towler, Brian (2018). Towards closure relations for the rise velocity of Taylor bubbles in annular piping using phase-field lattice Boltzmann techniques. 21st Australasian Fluid Mechanics Conference, Adelaide, SA, Australia, 10 - 13 December 2018. Hawthorn, VIC, Australia: Australasian Fluid Mechanics Society.
Leonardi, C. R., McCullough, J. W. S., Wang, D. and Aminossadati, S. M. (2018). Evaluation of the temperature-dependent rheology of non-Brownian particle suspensions via direct numerical simulation. 21st Australasian Fluid Mechanics Conference, Adelaide, SA Australia, 10-13 December 2018. Perth, WA Australia: Australasian Fluid Mechanics Society.
Masum, B. M., Aminossadati, S. M., Leonardi, C. R. and Amanzadeh, M. (2017). Mathematical modelling of gas flow in a hollow-core optical fibre. 2nd International Conference of Fibre-optic and Photonic Sensors for Industrial and Safety Applications, Brisbane, QLD Australia, 8 - 10 January 2017. Piscataway, NJ United States: Institute of Electrical and Electronic Engineers. doi: 10.1109/OFSIS.2017.13
Masum, B. M., Aminossadati, S. M., Leonardi, C. R., Kizil, M. S. and Amanzadeh, M. (2017). New generation of gas sensors for underground coal mining applications. Australian Mine Ventilation Conference, Brisbane, Australia, 28-30 August 2017. Brisbane, Australia: Australian Mine Ventilation Conference.
McCullough, Jon W.S., Leonardi, Christopher R., Jones, Bruce D., Aminossadati, Saiied M. and Williams, John R. (2016). Transient heat transfer modelling at straight and curved interfaces of disparate media using DDF-TLBM. Thirteenth International Conference for Mesoscopic Methods in Engineering and Science, Hamburg, Germany, 18-22 July, 2016.
Wang, Duo, Leonardi, Christopher and Aminossadati, Saiied M. (2016). Characterisation of proppant transport in hydraulic fractures using the coupled lattice Boltzmann method and discrete element method. Thirteenth International Conference for Mesoscopic Methods in Engineering and Science, Hamburg, Germany, 18-22 July, 2016.
Leonardi, Christopher , Regulski, Wojciech, McCullough, Jon W. S., Wang, Duo, Mitchell, Travis R., Jones, Bruce D. and Williams, John R. (2016). Characterising the Behaviour of Hydraulic Fracturing Fluids via Direct Numerical Simulation. SPE Asia Pacific Oil & Gas Conference and Exhibition, Perth, Australia, 25-27 October 2016. Richardson, TX, United States: Society of Petroleum Engineers. doi: 10.2118/182458-MS
Kamyar, Amin, Aminossadati, Saiied Mostafa, Leonardi, Christopher and Sasmito, Agus (2016). Current developments and challenges of underground mine ventilation and cooling methods. 2016 Coal Operators' Conference, Wollongong, Australia, 10-12 Feb 2016. Wollongong, Australia: The University of Wollongong Printery.
Jones, B. D., Williams, J. and Leonardi, C. R. (2015). Simulation of particle suspensions using a coupled lattice boltzmann and discrete element method. 49th U.S. Rock Mechanics/Geomechanics Symposium, San Francisco, CA, United States, 29 June - 1 July 2015. Alexandria, VA, United States: The American Rock Mechanics Association.
Kamyar, Amin, Aminossadati, Saiied M. and Leonardi, Christopher R. (2015). Thermal and hydraulic performance of a heat exchanger operated with ice slurry as refrigerant. IAHR International Conference on Cooling Tower and Heat, Gold Coast, QLD, Australia, 7-11 September 2015. Brisbane, Australia: The University of Queensland.
McCullough, J. W. S., Leonardi, C. R. and Aminossadati, S. M. (2015). Application of Thermal Lattice Boltzmann Methods at Fluid-Solid Interfaces. Australasian Conference on Computational Mechanics, Brisbane, QLD, Australia, 30 November - 1 December 2015.
Leonardi, Christopher R., Jones, Bruce D., Holmes, David W. and Williams, John R. (2013). Simulation of complex particle suspensions using coupled lattice Boltzmann-discrete element methods. 6th International Conference on Discrete Element Methods (DEM6), Golden, CO, United States, 5-6 August, 2013. Golden, CO, United States: Colorado School of Mines.
Tilke, P. G., Leonardi, C. R., Holmes, D. W. and Williams, J. R. (2012). A multicore numerical framework for assessing the permeability of reservoir rocks. 4th International Conference on Porous Media and Their Applications in Science, Engineering and Industry (ICPM 2012), Potsdam, Germany, 17-22 June, 2012.
Williams, John R., Herrero, Sergio, Leonardi, Christopher, Chan, Stephen, Sanchez, Abel and Aung, Zeyar (2011). Large in-memory cyber-physical security-related analytics via scalable coherent shared memory architectures. IEEE Symposium on Computational Intelligence in Cyber Security (CISC2011), Paris, France, 11-15 April 2011. Piscataway, NJ, United States: IEEE. doi: 10.1109/CICYBS.2011.5949414
Leonardi, Christopher, Holmes, David W., Williams, John R. and Tilke, Peter G. (2011). A Multi-Core Numerical Framework for Characterizing Flow in Oil Reservoirs. 19th High Performance Computing Symposium (HCP2011), Boston USA, 4-7 april, 2011. San Diego, CA United States: Society for Computer Simulation International.
Owen, D. R. J., Feng, Y. T., Labao, M., Han, K., Leonardi, C. R., Yu, J. and Eve, R. (2009). Fluid/structure coupling in fracturing solids and particulate media. Abingdon, Oxfordshire, United Kingdom: Taylor & Francis. doi: 10.1080/17486020902767370
Leonardi, Christopher, Owens, D.R.J., Feng, Y.T. and Ferguson, W.T. (2008). Computational modelling of fines migration in block caving operations. 5th International Conference and Exhibition on Mass Mining (MassMin2008), Lulea, Sweden, 9-11 June 2008. Luleå, Sweden: Luleå University of Technology.
Owen. D. R. J., Feng, Y. T., Han, K. and Leonardi, C. R. (2007). Multi-field coupling strategies for large scale problems involving multi-fracturing rock and particulate media. 3rd Asian-Pacific Congress on Computational Mechanics (APCOM07), Kyoto , Japan, 3-6 December 2007.
Owen, D. R. J., Feng, Y. T., Labao, M., Leonardi, C. R., Zhao, S. Y. and Yu, J. (2007). Simulation of multi-fracturing rock media including fluid/structure coupling. 1st Canada-US Rock Mechanics Symposium, Vancouver BC, Canada, 27-31 May 2007. London: Taylor and Francis. doi: 10.1201/NOE0415444019-c57
Loughran, J.G. and Leonardi, Christopher (2005). Application of discrete element methods to modelling of belt feeders. 4th Australasian Congress on Applied Mechanics (ACAM05), Melbourne , Australia, 16-18 February 2005. North Melbourne, VIC Australia: Institute of Materials Engineering Australasia.
Research Report
Onederra, Italo, Leonardi, Christopher, Mitchell, Travis, Roslin, Alexandra, Araos, Miguel, Wang, Zi, Lopez, Paulo and Salazar, Felipe (2021). Targeted conditioning and extraction. Brisbane, QLD Australia: The University of Queensland.