HR: 1340h
AN: H33H-1731    [Abstracts]
TI: Numerical Simulation of Biodegradation Processes in Subsurface Systems
AU: * Hernandez-Rendon, M
EM: carmenhr@geofisica.unam.mx
AF: Instituto de Geofisica, Circuito de la Investigacion S/N, Ciudad Universitaria, Mexico, D.F., D.F 04510, Mexico
AB: In this work an evaluation of a numerical scheme to simulate mutispecies reactive transport undergoing biodegradation in porous media is presented. This procedure relies on the application of an operator splitting algorithm introduced by Glowinski [1]. It was used to simulate a system of two species transport with non linear reactions with good results. The main advantage in applying it is that the system of partial differential equations is fully decoupled. Approximation of time derivative is obtained using standard procedures. The spatial advection- diffusion part is solved by means of the standard Galerkin finite element method; nonlinear integrals are evaluated with Gaussian cuadrature. Numerical results are presented for two test cases that take into account the transport of five species; the first one with first order and sequential biotransformation is compared with the analytical solution and with the numerical approximation of the coupled system. In the second, nonlinear and simultaneous reactions are included. [1] Glowinski, R., (2000). Operator-splitting methods for initial value problems: Application to the atmospheric dispersion equations, Lectures 6-8, University of Houston.
DE: 1829 Groundwater hydrology
DE: 1832 Groundwater transport
DE: 1847 Modeling
DE: 1849 Numerical approximations and analysis
SC: Hydrology [H]
MN: 2007 Fall Meeting