3. DESCRIPTION OF PROGRAM OR FUNCTION
FEHM is a numerical simulation code for subsurface transport processes. It models 3-D, time-dependent, multiphase, multicomponent, non-isothermal, reactive flow through porous and fractured media. It can accurately represent complex 3-D geologic media and structures and their effects on subsurface flow and transport. Its capabilities include flow of gas, water, and heat; flow of air, water, and heat; multiple chemically
reactive and sorbing tracers; finite element/finite volume
formulation; coupled stress module; saturated and unsaturated media; and double porosity and double porosity/double permeability capabilities.