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The Effect of Gomphonema and Filamentous Algae Streamers on Hydroelectric Canal Capacity and Turbulent Boundary Layer Structure

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Sargison, JE and Andrewartha, JM and Perkins, KJ (2007) The Effect of Gomphonema and Filamentous Algae Streamers on Hydroelectric Canal Capacity and Turbulent Boundary Layer Structure. In: 16th Australasian Fluid Mechanics Conference, 2-7 December 2007, Crown Plaza, Gold Coast, Australia.

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Abstract

Gomphonema, a freshwater diatom, is currently being studied to
determine its effect on the capacity of hydroelectric canals and
the structure of turbulent boundary layers. Gomphonema is the
primary fouling organism present in Tarraleah No.1 Canal
(operated by Hydro Tasmania) and was found to cause a 10%
reduction in flow carrying capacity. Filamentous algae streamers
up to 200mm long have also been observed in the canal. A
recirculating water tunnel was used to measure the characteristics
of the boundary layer flow over a 997mm x 597mm test plate
covered with a biofilm grown in the field in an attempt to better
understand the mechanisms for the increase in drag. Mean
velocity profiles for the fouled test plate have been compared
with results for a smooth test plate.

Item Type: Conference or Workshop Item (Paper)
Journal or Publication Title: 16th Australasian Fluid Conference
Date Deposited: 02 Mar 2008 23:52
Last Modified: 18 Nov 2014 03:30
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