Flow induced vibrations, drag force, and pressure drop in conduits covered with biofilm


Lewandowski, Z. and Stoodley, P. (1995) Flow induced vibrations, drag force, and pressure drop in conduits covered with biofilm. Water Science and Technology, 32, (8), 19-26. (doi:10.1016/0273-1223(96)00003-0).

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Description/Abstract

Biofilm was grown in closed conduit reactors under turbulent flow conditions. Structural development of the biofilm suggests that individual microcolonies behave like blunt bodies shedding vortices. The microcolonies assumed elongated forms, termed ''streamers'', possibly because of an exerted pressure drag force. The streamers when entrained in the water flow vibrated rapidly dissipating kinetic energy from the bulk liquid. The energy was transferred through the biofilm causing the underlying microcolonies to oscillate. The measured pressure drop was partially attributed to the loss of energy due to these flow induced vibrations and oscillations.

Item Type: Article
ISSNs: 0273-1223 (print)
Related URLs:
Subjects: Q Science > QR Microbiology
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 157565
Date Deposited: 15 Jun 2010 11:02
Last Modified: 27 Mar 2014 19:14
URI: http://eprints.soton.ac.uk/id/eprint/157565

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