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SUMMARY:Simulating Biofilm Growth and Detachment in Porous Media using the
  Lattice Boltzmann Method - Thomas Pintelon\, Department of Chemical Engin
 eering and Biotechnology\, Cambridge University
DTSTART:20080905T120000Z
DTEND:20080905T130000Z
UID:TALK14215@talks.cam.ac.uk
CONTACT:Vanessa Blake
DESCRIPTION:To simulate the complexity of biofilm growth on geometrically\
 ncomplex support structures\, 3D pore-scale models are necessary. The latt
 ice\nBoltzmann (LB) method was used to solve the required coupled hydrodyn
 amics\nand mass transfer equations because of its proven high performance 
 in\nsimulating these processes in arbitrary complex geometries. The fluid\
 nvelocity\, pressure and solute concentrations fields calculated with LB w
 ere\ncoupled with an individual based biofilm growth model (IbM). In order
  to\nsimulate shear induced biomass detachment\, a fast marching level set
  (FMLS)\nmethod has been implemented that models the propagation of the\nb
 iofilm/liquid interface with a speed proportional to this surrounding shea
 r\nfield. This talk will discuss how and why the presented approach is mos
 t\napplicable to biofilm growth in porous media. The influence of hydrodyn
 amics\nand nutrient mass transfer on biofilm growth and development in mod
 el\ncomplex porous media was considered and discussed by comparing the\nsi
 mulation results for constant pressure drop (CPD) and constant volumetric\
 nflow rate (CVF) operation modes for the provision of nutrients to the\nsy
 stem. It is demonstrated that the resulting biofilm growth and\npermeabili
 ty reduction is a complex competition between nutrient supply and\ndetachm
 ent.\n
LOCATION:Lecture Theatre 2\, Department of Chemical Engineering
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