HR: 16:45h
AN: H34A-04    [Abstracts]
TI: Volume of fluid (VOF) simulation of two-phase incompressible fluid flow through interconnected pores and fracture networks
AU: * Huang, H
EM: huangh@inel.gov
AF: Idaho National Engineering & Environmental Lab, P.O. Box 1625, MS 2025, Idaho Falls, ID 83415 United States
AU: Meakin, P
EM: meakp@inel.gov
AF: Idaho National Engineering & Environmental Lab, P.O. Box 1625, MS 2025, Idaho Falls, ID 83415 United States
AB: A volume of fluid (VOF) method based on the Los Alamos National Laboratory two-dimensional RIPPLE code was used to model transient, partially saturated incompressible fluid flows through porous matrices and interconnected factures. The fluid/fluid interface was implicitly represented and tracked by fractional volume of fluid (VOF) information defined on the center of each grid cell. Complex interface dynamics such as coalescence and fragmentation are automatically handled by tracking the evolutions of the VOF data. The curvature of the interface, and consequently the pressure difference due to surface tension, are also computed using the VOF data. A two-step projection method was used to solve the incompressible Navier-Stokes equations, aided by an incomplete Cholesky conjugate gradient (ICCG) solution technique for the pressure Poisson equation. Solid grains and fracture walls were modeled as interior obstacles. The contact angle between the fluid interface and solid obstacles is directly specified as a boundary condition, with different values assigned to advancing and receding fluid-fluid-solid contacts. The method can handle two-phase fluid flow problems with large density ratios.
DE: 5104 Fracture and flow
DE: 5112 Microstructure
DE: 5139 Transport properties
DE: 3210 Modeling
SC: Hydrology [H]
MN: 2004 AGU Fall Meeting