1. General Model Information

Name: Finite Element Heat and Mass Transfer Code

Acronym: FEHM

Main medium: terrestrial
Main subject: biogeochemistry, hydrology
Organization level: ecosystem
Type of model: partial differential equations (finite elements,3D), ordinary differential equations
Main application:
Keywords: 3D, solute transport, contaminant, soil , unsaurated, porous media, fractured media, heat transport, water flow, gas flow, nonwetting fluid flow, finite element numerics, dual porosity,non-isothermal, multiphase, multicomponent, dual porosity, adsorption, desorption, reactive


George Zyvoloski, Team Leader
MS F665, Los Alamos National Laboratory
Los Alamos, NM 87545
Voice (505)667-1581 FAX (505)665-3687



A numerical simulation code for subsurface transport processes. It models 3D, time-dependent, multiphase, multicomponent, non-isothermal, reactive flow through porous and fractured media. Capabilities: flow of gas, water, oil 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; double porosity and double porosity/double permeability capabilities.

FEHM home page

II. Technical Information

II.1 Executables:

Operating System(s): DOS executables, source code, manual, data

II.2 Source-code:

Programming Language(s):

II.3 Manuals:

Download FEHM User's Manual (Postscript)ftp-address for postscript-files

II.4 Data:

example Data

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

K. Birdsell, W. Soll, N. Rosenberg, B. Robinson 1995 "Numerical Modeling of Unsaturated Groundwater Flow and Radionuclide Transport at MDA G", Los Alamos National Laboratory Report LA-UR-95-2735, Los Alamos, NM.
G. Zyvoloski, B. Robinson, Z.Dash, L. Trease 1995: "Models and Methods Summary for the FEHMN Application"(POSTSCRIPTFILE), Los Alamos National Laboratory Report LA-UR-94-3787, Los Alamos, NM, 1995.

FEHM User's Manual (Postscript)

V. Further information in the World-Wide-Web

VI. Additional remarks

Last review of this document by: T. Gabele: 12 .08. 1997 -
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:42 CEST 2002

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