Flow induced vibrations, drag force, and pressure drop in conduits covered with biofilm
Flow induced vibrations, drag force, and pressure drop in conduits covered with biofilm
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.
19-26
Lewandowski, Z.
1f3f2a52-af00-4d39-99b9-cb4a372959ce
Stoodley, P.
08614665-92a9-4466-806e-20c6daeb483f
1995
Lewandowski, Z.
1f3f2a52-af00-4d39-99b9-cb4a372959ce
Stoodley, P.
08614665-92a9-4466-806e-20c6daeb483f
Lewandowski, Z. and Stoodley, P.
(1995)
Flow induced vibrations, drag force, and pressure drop in conduits covered with biofilm.
Water Science & Technology, 32 (8), .
(doi:10.1016/0273-1223(96)00003-0).
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.
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Published date: 1995
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 157565
URI: http://eprints.soton.ac.uk/id/eprint/157565
ISSN: 0273-1223
PURE UUID: 361db914-0d92-4a95-b3a2-a1466cbca665
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Date deposited: 15 Jun 2010 11:02
Last modified: 14 Mar 2024 02:55
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Author:
Z. Lewandowski
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