1. General Model Information
Name: BIM/BIM2D/BIM3D/FRACGEN
Acronym: BIM_FRACGEN
Main medium: terrestrial
Main subject: hydrology
Organization level: Ecosystem
Type of model: partial differential equations (finite elements,3D)
Main application:
Keywords: unsaturated, water flow, solute transport, porous medium, non-porous medium,fractures, fracture network
Contact:
D.D. Evans
University of Arizona
Tucson, AZ 85721
phone:
fax:
email:
Author(s):
Rasmussen, T.C., and D.D. Evans
Abstract:
The BIM/FRACGEN package simulates flow and (advective) solute transport in
unsaturated, fractured, porous or non-porous media. It solves the boundary value
problem within intersecting fracture planes using the boundary integral method
applied to two- (BIM2D) and three-dimensional (BIM3D) formulations for flow
using a constant capillary head within individual fractures. The transport problem
is solved through calculating travel times and breakthrough curves by integrating
the inverse velocity over a streamline, and then summing over all streamlines. The
transport equation includes linear equilibrium reversible sorption (retardation) and
diffusion from fractures into the rock matrix and v.v. FRACGEN generates
synthetic fracture networks for sensitivity analysis with respect to fracture
network parameters. The program BIM provides estimates of steady flow rates,
hydraulic head distributions, travel times and breakthrough curves for discrete
fracture networks, incorporating both saturated and variably saturated flow. The
program BIM2D is used to dicretize the fracture network and then solve for
steady fluid flow and transport using the boundary integral method. It is limited to
applications involving non-porous rock. The program BIM3D is used to study
coupled flow through a fracture network embedded within a permeable matrix.
The program FRACGEN is used to determine the global hydraulic conductivity of
a fractured rock mass by generating finite fractures within a specified rock
volume and then solving the finite lines of intersections between fractures and
between fractures and the rock volume boundary. It uses site-specific geometric
data, or generates synthetic fractures.
Source of the Abstract:CSMoS online
II. Technical Information
II.1 Executables:
Operating System(s): DOS, public domain
II.2 Source-code:
Programming Language(s): FORTRAN, public domain
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
V. Further information in the World-Wide-Web
VI. Additional remarks
Last review of this document by: Wed Oct 8 10:21:20 1997
Status of the document:
last modified by
Tobias Gabele Wed Aug 21 21:44:39 CEST 2002