Stuart D. C. Walsh

Stuart is a research associate in the Geofluids group at the Department of Geology and Geophysics, University of Minnesota, 21 Pillsbury Hall, 310 Pillsbury Drive SE, Minneapolis, MN 55455-0219. He is currently working as a visiting research scientist in the School of Chemical and Biomolecular Engineering at Cornell University, Ithaca, NY 14853.

Current Research Interests

• Computational Fluid Dynamics, in particular Lattice-Boltzmann simulations
• General-Purpose Graphics Processing Unit (GPGPU) programming
• Volcanology - The application of percolation theory to magma rheology and permeability
• Carbonate Systems - Multi-scale simulation of permeability development in carbonate systems.
• Research Plan (restricted link).

Publications

This page lists publications by Stuart Walsh. A complete list of publications by the University of Minnesota Geofluids group is given on the Geofluids publications page.

Journal Articles

S.D.C. Walsh, M.O. Saar, Macroscale lattice-Boltzmann methods for solute and heat transport in heterogeneous porous, fractured, and conduit media, Water Resources Research (submitted 2009).

S.D.C. Walsh, M.O. Saar, P. Bailey, D.J. Lilja, Accelerating Geo-Science and Engineering System Simulations on Graphics Hardware, Computers And Geosciences, 35 (12)(2009), 2353-2364, [doi:10.1016/j.cageo.2009.05.001].

S.D.C. Walsh, H. Burwinkle, M.O. Saar, A new partial-bounceback lattice-Boltzmann method for fluid flow through heterogeneous media, Computers And Geosciences, 35 (6)(2009), 1186-1193, [doi:10.1016/j.cageo.2008.05.004].

S.D.C. Walsh, M.O. Saar, Magma Yield Stress and Permeability: Insights From Multiphase Percolation Theory, Journal of Volcanology and Geothermal Research, 177(4)(2008), 1011-1019, [doi:10.1016/j.jvolgeores.2008.07.009].

S.D.C. Walsh, M.O. Saar, Numerical models of stiffness and yield stress growth in crystal-melt suspensions, Earth and Planetary Science Letters, 267 (2008), 32-44, [doi:10.1016/j.epsl.2007.11.028].

A. Tordesillas, M. Muthuswamy, S.D.C. Walsh, Mesoscale measures of nonaffine deformation in dense granular assemblies, Journal of Engineering Mechanics, A.S.C.E., 134 (12) (2008), 1095-1113, [doi 10.1061/(ASCE)0733-9399(2008)134:12(1095)].

A. Tordesillas, S.D.C. Walsh, M. Muthuswamy, The effect of local kinematics on the local and global deformations of granular systems, Mathematics and Mechanics of Solids, (2008) [doi:10.1177/1081286508089844].

S.D.C. Walsh, A. Tordesillas, J.F. Peters, Development of micromechanical models for granular media, Granular Matter, 9 (5) (2007), 337-352.

S.D.C. Walsh, A. Tordesillas, Finite element methods for micropolar models of granular materials, Applied Mathematical Modelling, 30 (2006), 1043-1055.

S.D.C. Walsh, A thermomechanical approach for micromechanical continuum models of granular media, Ph.D. Thesis, University of Melbourne, 2005.

S.D.C. Walsh, A. Tordesillas, A thermomechanical formulation of finite element schemes for micropolar continua, ANZIAM J. 46(E)(2005), C336-C350.

S.D.C. Walsh, A. Tordesillas, The stress response of a semi-infinite micropolar granular material subject to a concentrated force normal to the boundary, Granular Matter 6(1)(2004), 27-37.

A. Tordesillas, S.D.C. Walsh, B.S. Gardiner, Bridging the length scales: Micromechanics of granular media, BIT 44(2004), 539-556.

S.D.C. Walsh, A. Tordesillas, A thermomechanical approach to the development of micropolar constitutive models of granular media, Acta Mechanica 167(3-4)(2004), 145-169.

A. Tordesillas, S.D.C. Walsh, Incorporating rolling resistance and contact anisotropy in micromechanical models of granular media. Powder Technology 124(1 & 2)(2002), 106-111.

Conference Papers

P. Bailey, J. Myre, S.D.C. Walsh, M.O. Saar, D.J. Lilja, Accelerating Lattice Boltzmann Fluid Flow Simulations Using Graphics Processors, International Conference on Parallel Processing : Vienna, Austria (ICPP 2009), 2009.

S.D.C. Walsh, S.C. Alexander, M.O. Saar, Lattice-Boltzmann Simulations of carbonate systems, in Sinkholes and the Environmental Impacts of Karst, Proceedings of the Eleventh Multidisciplinary Conference, Ed. L.B. Yuhr, E.C. Alexander, Jr., B.F. Beck, American Society of Civil Engineers, Geotechnical Special Publication No. 183, pp. 761, 444-453, 2008.

S.D.C. Walsh, A. Tordesillas, Injecting particle scale physics into continuum models for granular materials. Earth and Space, in: Proceedings of the Tenth Biennial ASCE Aerospace Division International Conference on Engineering, Construction, and Operations in Challenging Environments Ramesh B. Malla, Wieslaw K. Binienda, Arup K. Maji, Editors, League City/Houston, Texas, USA, 2006.

A. Tordesillas, S.D.C. Walsh, Analysis of deformation and localization in thermomicromechanical Cosserat models of granular media, in: R.Garcia-Rojo, H.J. Herrmann & S. McNamara, Eds. Powders and Grains 05 Vol. 1, A.A.Balkema, Rotterdam, 2005, pp. 419-424.

A. Tordesillas, S.D.C. Walsh, J.F. Peters, J.T. Bosko and M. Muthuswamy, Development of micromechanical models for granular media: kinematics and nonaffine motion, Proceeding of the 5th World Congress on Particle Technology, American Institute of Chemical Engineers, ISBN 0-8169-1005-7 (2006).

S.D.C. Walsh, A. Tordesillas, Stranger than friction: Micromechanics of granular media, ISTVS Meeting. Vicksburg, MS.: ISTVS. (2002).

Invited Presentations

S.D.C. Walsh, Using General Purpose Graphics Processing Units to Simulate Geophysical Fluid Dynamics, NVIDIA Heterogeneous GPU Computing Seminar- April 6, 2009, University of Minnesota

S.D.C. Walsh, J. Myre, P. Bailey, M.O. Saar, and D.J. Lilja, GPU implementation of multiphase lattice-Boltzmann simulations, poster presentation at: Path to Petascale: Adapting GEO/CHEM/ASTRO Applications for Accelerators and Accelerator Clusters, April 2-3, 2009, National Center for Supercomputing Application Urbana, IL.

Recent Abstracts (for conference presentations as talks or posters)

S.D.C. Walsh, J. Myre, M.O. Saar, D.J. Lilja, Multi-GPU, Multi-core, Multi-phase Lattice-Boltzmann Simulations of Fluid Flow for the Geosciences, Eos Trans. AGU, Fall Meet. Suppl., 2009.

S.D.C. Walsh, M.O. Saar, P. Bailey, and D.J. Lilja, Cheaper and faster: How to have your cake and eat it too with GPU implementations of Earth Science simulations, Eos Trans. AGU, Fall Meet. Suppl., 2008.

M.O. Saar and S.D.C. Walsh, Preferred Flow Path Development in Heterogeneous Porous Media During Reactive Flow: A Macro-Scale Lattice-Boltzmann Method, Eos Trans. AGU, Fall Meet. Suppl., 2008.

M.D. Covington, S.D.C. Walsh, C.M. Wicks, and M.O. Saar, Modeling the Effects of Variable Recharge and Conduit Geometry on Flow Through Karstic Aquifers, Eos Trans. AGU, Fall Meet. Suppl., 2008.

M.A. Davis, S.D.C. Walsh, M.O. Saar, and J.J. Roberts, Magma Permeability Estimates From X-ray Tomography Scans Eos Trans. AGU, Fall Meet. Suppl., 2008.

K.J. Anderson, S.D.C. Walsh, and M.O. Saar, Methods of Geofluids.Permeability Calculation for Vesicular Materials, Eos Trans. AGU, Fall Meet. Suppl., Abstract V21C-0726, poster, 2007.

M.O. Saar, and S.D.C. Walsh, Simulations of Stiffness and Yield Stress Growth in Crystal Networks, Eos Trans. AGU, Fall Meet. Suppl., Abstract V13E-04, talk, 2007.

M.A. Davis, S.D.C. Walsh, M.O. Saar, and J.J. Roberts, Numerical Reconstructions of Volcanic Tephra: Using Tomography and Two-Point Correlation Functions to Determine Magma Geofluids.Permeability, Eos Trans. AGU, Fall Meet. Suppl., Abstract V12B-02, talk, 2007.

S.D.C. Walsh, H. Burwinkle, R. O'Grady, and M.O. Saar, Lattice-Boltzmann Simulations of Heterogeneous Porous Media: A Comparison Between Three Approaches, Eos Trans. AGU, Fall Meet. Suppl., Abstract H33H-1720, poster, 2007.

S.D.C Walsh, S. Alexander, and M.O. Saar, Lattice-Boltzmann models of speleogenic processes, GSA National Meeting - Denver, Geological Society of America, Abstracts with Programs, 2007.

S.D.C. Walsh and M.O. Saar, Insights Into Magmatic Properties From Multiphase Percolation Theory, Eos Trans. AGU, Fall Meet. Suppl., Abstract V34A-08, 2006.

M.A. Davis, S.D.C. Walsh, K.J. Anderson, and M.O. Saar, Upscaling Pumice-Sized Bubble Networks to the Volcanic Conduit Scale: Implications for Magma Permeabilities and Volatile Degassing Rates, Eos Trans. AGU, Fall Meet. Suppl., Abstract V43A-1774, 2006.