A two-dimensional continuum model of biofilm growth incorporating fluid flow and shear stress based detachment

Handle URI:
http://hdl.handle.net/10754/561392
Title:
A two-dimensional continuum model of biofilm growth incorporating fluid flow and shear stress based detachment
Authors:
Duddu, Ravindra; Chopp, David L.; Moran, Brian ( 0000-0002-6875-8630 )
Abstract:
We present a two-dimensional biofilm growth model in a continuum framework using an Eulerian description. A computational technique based on the eXtended Finite Element Method (XFEM) and the level set method is used to simulate the growth of the biofilm. The model considers fluid flow around the biofilm surface, the advection-diffusion and reaction of substrate, variable biomass volume fraction and erosion due to the interfacial shear stress at the biofilm-fluid interface. The key assumptions of the model and the governing equations of transport, biofilm kinetics and biofilm mechanics are presented. Our 2D biofilm growth results are in good agreement with those obtained by Picioreanu et al. (Biotechnol Bioeng 69(5):504-515, 2000). Detachment due to erosion is modeled using two continuous speed functions based on: (a) interfacial shear stress and (b) biofilm height. A relation between the two detachment models in the case of a 1D biofilm is established and simulated biofilm results with detachment in 2D are presented. The stress in the biofilm due to fluid flow is evaluated and higher stresses are observed close to the substratum where the biofilm is attached. © 2008 Wiley Periodicals, Inc.
KAUST Department:
Biological and Environmental Sciences and Engineering (BESE) Division; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program
Publisher:
Wiley
Journal:
Biotechnology and Bioengineering
Issue Date:
1-May-2009
DOI:
10.1002/bit.22233
PubMed ID:
19213021
Type:
Article
ISSN:
00063592
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Mechanical Engineering Program; Biological and Environmental Sciences and Engineering (BESE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorDuddu, Ravindraen
dc.contributor.authorChopp, David L.en
dc.contributor.authorMoran, Brianen
dc.date.accessioned2015-08-02T09:10:29Zen
dc.date.available2015-08-02T09:10:29Zen
dc.date.issued2009-05-01en
dc.identifier.issn00063592en
dc.identifier.pmid19213021en
dc.identifier.doi10.1002/bit.22233en
dc.identifier.urihttp://hdl.handle.net/10754/561392en
dc.description.abstractWe present a two-dimensional biofilm growth model in a continuum framework using an Eulerian description. A computational technique based on the eXtended Finite Element Method (XFEM) and the level set method is used to simulate the growth of the biofilm. The model considers fluid flow around the biofilm surface, the advection-diffusion and reaction of substrate, variable biomass volume fraction and erosion due to the interfacial shear stress at the biofilm-fluid interface. The key assumptions of the model and the governing equations of transport, biofilm kinetics and biofilm mechanics are presented. Our 2D biofilm growth results are in good agreement with those obtained by Picioreanu et al. (Biotechnol Bioeng 69(5):504-515, 2000). Detachment due to erosion is modeled using two continuous speed functions based on: (a) interfacial shear stress and (b) biofilm height. A relation between the two detachment models in the case of a 1D biofilm is established and simulated biofilm results with detachment in 2D are presented. The stress in the biofilm due to fluid flow is evaluated and higher stresses are observed close to the substratum where the biofilm is attached. © 2008 Wiley Periodicals, Inc.en
dc.publisherWileyen
dc.subjectAdvection-diffusionen
dc.subjectBiofilmen
dc.subjectDetachmenten
dc.subjectErosionen
dc.subjectFluid flowen
dc.subjectInterfacial shear stressen
dc.subjectInternal stressen
dc.titleA two-dimensional continuum model of biofilm growth incorporating fluid flow and shear stress based detachmenten
dc.typeArticleen
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Divisionen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentMechanical Engineering Programen
dc.identifier.journalBiotechnology and Bioengineeringen
dc.contributor.institutionDepartment of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Rd, Evanston, IL 60208, United Statesen
dc.contributor.institutionDepartment of Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, IL, United Statesen
kaust.authorMoran, Brianen

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