HR: 16:00h
AN: B24A-03    [Abstracts]
TI: Direct Numerical Simulation of Motile Bacteria and Conjugative Transfer in the Happel Model of Porous Media
AU: Nelson, K E
EM: knelson@ucdavis.edu
AF: UC Davis, Civil & Environmental Engineering, Davis, CA 95616 United States
AU: Massoudieh, A
EM: amassoudieh@ucdavis.edu
AF: UC Davis, Civil & Environmental Engineering, Davis, CA 95616 United States
AU: * Ginn, T R
EM: trginn@ucdavis.edu
AF: UC Davis, Civil & Environmental Engineering, Davis, CA 95616 United States
AU: Lambertini, E
EM: elambertini@ucdavis.edu
AF: UC Davis, Civil & Environmental Engineering, Davis, CA 95616 United States
AU: Mathew, A
EM: amathew@ucdavis.edu
AF: UC Davis, Civil & Environmental Engineering, Davis, CA 95616 United States
AB: Bacterial transport in natural porous media is often addressed with tools from colloid filtration theory (CFT), much of which is based on the idealized Happel Sphere-in-Cell conceptual model. The analysis of colloid and in particular bacterial transport in natural porous media using this model entails several important assumptions. In order to examine the sensitivity of the results of this analysis to the validity or failure of basic assumptions we constructed a direct numerical simulation of colloid transport in the Sphere-in-cell model using a lagrangean framework. In particular we report on use of the numerical solutions to assess the validity of superposition principles previously relied upon to combine advective and diffusive components of the transport, we explore the affect of bacterial motility on transport, and we describe preliminary results in the use of the model in investigating the rates of horizontal conjugative gene transfer in granular porous media.
DE: 0400 Biogeosciences
DE: 1831 Groundwater quality
DE: 3210 Modeling
SC: Biogeosciences [B]
MN: 2005 Joint Assembly