Hierarchical hybrid simulation of biofilm growth dynamics in 3D porous media
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Cita com:
hdl:2117/327378
Tipus de documentText en actes de congrés
Data publicació2011
EditorCIMNE
Condicions d'accésAccés obert
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Abstract
Recently, we developed the first hierarchical, hybrid simulator for the prediction of
the pattern of evolution and the rate of growth of heterogeneous biofilms within the pore
space of porous media [Kapellos et al., Adv. Water Resour. (2007) 30:1648-1667]. A n
improved version of our simulator is presented in this work. A continuum-based approach for
fluid flow and solute transport is combined with individual-based approaches for biofilm
growth, detachment, and migration in the pore space. The Navier-Stokes-Brinkman equations
are solved numerically with a marker-and-cell finite difference scheme to determine the
velocity and pressure fields in the pore space. Momentum transport in the biofilms is
described in the context of biphasic poroelasticity and a Galerkin finite element method is
used to determine the solid stress field. Shear-induced biofilm detachment is taken into
account explicitly and a Lagrangian-type simulation is used to determine the trajectories of
detached fragments. Nutrient transport in the pore space is described by the convectiondiffusion-
reaction equation, which is solved numerically with an operator-splitting finite
difference scheme. Further, a novel, physically-constrained cellular-automaton model is used
for biofilm proliferation. As an example application, the simulator is used to investigate the
impact of biofilm formation on the fate and transport of suspended particles in a network of
three-dimensional pores.
CitacióKapellos, G.E.; Alexiou, T.S.; Pavlou, S. Hierarchical hybrid simulation of biofilm growth dynamics in 3D porous media. A: COUPLED IV. "COUPLED IV : proceedings of the IV International Conference on Computational Methods for Coupled Problems in Science and Engineering". CIMNE, 2011, p. 710-720. ISBN 978-84-89925-78-6.
ISBN978-84-89925-78-6
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Coupled-2011-62_Hierarchical hybrid simulation.pdf | 1,312Mb | Visualitza/Obre |