Porous Media
Highfidelity simulations of groundwater flow provide valuable insights into many geologic phenomena important to the US Department of Energy, such as

AMR Framework for Multicomponent Multiphase Reactive Flow Adaptive mesh refinement (AMR) methods address the challenges outlined above:

Carbon Dioxide Sequestration
In one scenario for carbon sequestration, CO2 is injected as a liquid phase into a saline aquifer. The liquid CO2 is lighter than the brine and floats on top of it in the aquifer. However, as the brine is enriched by diffusive mixing with CO2, it becomes denser than the fluid in the aquifer, inducing a buoyancy driven flow in the aquifer. To better understand and characterize this process, we perform high resolution simulations that examine the transport mechanisms and provide accurate quantifications of integral measures such as onset time of convection and the long term stabilized mass flux. 
Reactive Flow Accurate modeling of reacting flow has many important ramifications in geologically important problems such as carbon sequestration and environmental remediation. We have developed a secondorder accurate adaptive scheme for the accurate simulation of reactive flow. Geochemical systems are treated using the chemistry module of TOUGHREACT. 
For more information, please contact George Pau.
Relevant Publications
G. S. H. Pau, J. B. Bell, K. Pruess, A. S. Almgren, M. J. Lijewski, K. Zhang, "High resolution simulation and characterization of densitydriven flow in CO2 storage in saline aquifers'', Advances in Water Resources , 33(4):443455, 2010. [pdf]
G. S. H. Pau, J. B. Bell, K. Pruess, A. S. Almgren, M. J. Lijewski, K. Zhang, "Numerical studies of densitydriven flow in CO2 storage in saline aquifers'', Proceedings of TOUGH Symposium, September 1416 2009, Berkeley, California, USA. [pdf]
G. S. H. Pau, A. S. Almgren, J. B. Bell, M. J. Lijewski, E. Sonnenthal, N. Spycher, T. Xu, G. Zhang, "A Parallel SecondOrder Adaptive Mesh Algorithm for Reactive Flow in Geochemical Systems", Proceedings of TOUGH Symposium, September 1416 2009, Berkeley, California, USA. [pdf]
G. S. H. Pau, A. S. Almgren, J. B. Bell, and M. J. Lijewski, "A Parallel SecondOrder Adaptive Mesh Algorithm for Incompressible Flow in Porous Media", Phil. Trans. R. Soc. A, 2009. LBNL Report LBNL176E. [pdf]
D.E.A. van Odyck, J.B. Bell, F. Monmont, N. Nikiforakis, "The mathematical structure of multiphase thermal models of flow in porous media", to appear in Proc. Royal Soc. A. [pdf]