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Development Team

STOMP was developed within the Hydrology Group at Pacific Northwest National Laboratory (PNNL) with the support of the U.S. Department of Energy, Office of Environmental Restoration and Waste Management. Originally conceived of and developed by Mark White, STOMP has evolved through the efforts of numerous scientists at PNNL who contribute to the development of new capabilities in addition to using STOMP for a variety of applications. Short summarries of development team members' areas of expertise are provided below. For additional information, follow the link to the staff member's page on the PNNL website.

Mark White is a Senior Research Engineer and is the senior author of STOMP. The principal focus of Dr. White’s research activities has been the development and application of scientific computer codes for modeling multifluid flow and reactive transport processes associated with the environmental remediation and management of contaminated subsurface sites. More recently, he has extended his environmental research to include sparsely vegetated surface barriers for the protection of contaminated subsurface sites, geologic sequestration of CO2 in deep saline aquifers to help mitigate global warming, and investigation of gas hydrate production using conventional technologies. In collaboration with the experimentalists at PNNL, he has actively pursued new theories and the development of practical algorithms for describing multifluid flow through porous media, considering nonwetting fluid entrapment, hysteresis, and residual formation. His personal environmental application areas have been those associated with the migration of nonaqueous phase liquids (NAPLs), the performance of sparsely vegetated barriers, the coupled thermal and hydrologic system surrounding storage tanks for nuclear waste and repositories for spent nuclear fuel, and the migration and mineralization of supercritical CO2 injected into deep saline formations. With renewed interest in alternative energy sources such as oil shales, oil sands, coal beds, and gas hydrates, he has been funded to develop and apply STOMP to investigate environmentally responsible and innovative approaches to producing these fuels. Dr. White has participated in several international code comparison studies for various operational modes of STOMP.

Diana Bacon is a Senior Research Scientist with over 20 years of experience in groundwater and vadose zone hydrology, geochemistry, and modeling. She has contributed to the development of STOMP by parallelizing the water-air-energy-plant mode and several well models. She has also modified the reactive transport solver, ECKEChem, to enhance the capability to simulate gas-phase species and added new kinetic reaction forms. Dr. Bacon is currently supporting the development and application of STOMP-WCSE for the CO2 Sequestration pilot project at American Electric Power's Mountaineer Site in West Virginia. She has modeled CO2 injection potential at several sites for the Midwest Regional Carbon Sequestration Partnership, including the Greenville, Ohio Phase III site, Holland, Michigan and East Bend. Dr. Bacon has validated STOMP-WCSE (water, CO2, salt, energy) against a 10,000 metric ton CO2 injection at the Gaylord, Michigan Phase II Site. Using STOMP-WCS-R (water, CO2, salt, reactions) she has developed reactive transport simulations of CO2 sequestration in dolomite/sandstone formations in the Ohio River Valley and also in basalt formations in the Columbia Plateau.

Vicky Freedman is a Senior Research Scientist with experience in field-scale reactive transport of high-ionic tank stream wastes in the vadose zone at the Hanford site using high performance computing (STOMP90). Her most recent publications address the development of film permeability models for mineral precipitation and dissolution. Recently Dr. Freedman has been applying STOMP to investigate soil dessication technologies as well as the viability of using open-loop Ground Soure Heat Pump systems.

Mart Oostrom is a Senior Research Scientist and Director of the Intermediate-scale Flow and Transport Experimental Facility at PNNL. The facility employs several meter-scale columns and flow cells for single- and multiphase experimentation. He is co-author of the STOMP simulator, which has been tested extensively with data obtained in the experimental facility. Dr. Oostrom’s expertise is in numerical and experimental multifluid flow and transport in porous media.

Mark Rockhold is a Senior Research Scientist with over 20 years experience in vadose zone hydrology and numerical modeling. He has extensive experience in development and application of STOMP in the research areas of vadose zone flow and transport, surface barriers, reactive transport and vadose zone migration of NAPLs.

Signe (Wurstner) White is a Senior Research Scientist with over 20 years experience in subsurface flow and transport modeling. Currently, she is contributing to the develoment and application of STOMP in the areas of geologic sequestration of CO2 and methane gas hydrate production. Ms. Wurstner is a member of the Geologic Sequestration Software Suite (GS3) development team and is a STOMP short course instructor.

Fred Zhang is a Senior Research Scientist with extensive experience in the areas of vadose zone flow and transport, surface barrier technology, migration of NAPLs, and parameter estimation and inverse modeling.