1. General Model Information

Name: Multiphase Flow and Transport of Multicomponent Organic Liquids

Acronym: MOFAT22

Main medium: terrestrial
Main subject: hydrology
Organization level: ecosystem
Type of model: partial differential equations (finite elements,2D)
Main application:
Keywords: pollution, transient state, 2D, multiphase flow, multicomponent transport, fluids, water, nonaqueous phase liquid (NAPL), gas, Garlekin finite element numerics


Draper Aden Environmental Modeling, Inc. (DAEM)
2206 South Main Street
VA 24060

TEL: +1 540 961 DAEM (3236)
FAX: +1 540 552 0291



MOFAT is a two-dimensional finite element model developed for the EPA for coupled multiphase flow and multicomponent transport in 2-D planar or radially symmetric vertical sections. Flow and transport of three fluid phases - water, nonaqueous phase liquid (NAPL) and gas - is simulated by the program. MOFAT also handles cases in which gas and/or NAPL phases are absent in part or all of the domain at any given time. Transport of up to five partitionable species through saturated and unsaturated zones in Cartesian or radial coordinates can be investigated.

MOFAT achieves a high degree of computational efficiency by solving flow equations at each node (on the finite element mesh) only for phases that are undergoing changes in pressures and saturations above specified tolerances using a new "adaptive solution domain" method. Therefore, if NAPL is absent or exists at a residual saturation, MOFAT will locally eliminate those flow equations. MOFAT analyzes convective-dispersive transport in water, NAPL, and gas phases by assuming local equilibrium or nonequilibrium partitioning among the fluid phases and with the solid phase. The model considers interphase mass transfer and compositional dependence of phase densities. A concise but accurate description of soil capillary pressure relations is used which assures natural continuity between single-phase, two-phase and three-phase conditions. The user can estimate soil properties using DAEM's SOILPARA.

Model with MOFAT:

Draper Arden have developed a Windows interface for Mofat: MOFAT for Windows 3.0 Author of the abstract: Draper Aden Environmental Modeling, Inc. (DAEM)

Further information: MOFAT 2.2

II. Technical Information

II.1 Executables:

Operating System(s): Download MOFAT Ver. 2.0a Installation Disk

II.2 Source-code:

Programming Language(s):

II.3 Manuals:

II.4 Data:

III. Mathematical Information

III.1 Mathematics

III.2 Quantities

III.2.1 Input

III.2.2 Output

IV. References

Kaluarachchi, J.J. and Parker, J.C., 1989.An efficient finite element method for modeling multiphase flow in porous media.Water Resour. Res. 25:43-54.

Parker, J.C., Lenhard, R.J. and Kuppusamy, T., 1987.A parametre model for constitutive properties governing multiphase flow in porous media. Water Resour. Res. 23:618-624.

Parker, J.C., 1989.Multiphase flow and transport in porous media. Reviews of Geophysics. 27:311-328.

Sleep, B.E. and Sykes, J.F., 1989.Modeling the transport of volatile organics in varibly saturated media.Water Resours. Res. 25:81-92.

V. Further information in the World-Wide-Web

VI. Additional remarks

Order Sheet and pricing information

Last review of this document by: T. GabeleNov 21th 1997
Status of the document:
last modified by Tobias Gabele Wed Aug 21 21:44:46 CEST 2002

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