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A baseline study of the effect of freshwater biofilms in an hydraulic conduit


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Barton, AF, Sargison, JE, Walker, GJ, Osborn, JE and Brandner, PA 2005 , 'A baseline study of the effect of freshwater biofilms in an hydraulic conduit', paper presented at the Proceedings of XXXI IAHR Congress, 11th~16th September, 2005, Seoul, Korea.

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A program is underway at the University of Tasmania investigating ways to control
biological growths in hydraulic conduits. The broad aim of this research is to minimise the
effects of biological growths to optimize conduit performance and maintenance procedures,
and increase the economic return from existing hydraulic infrastructure. This paper presents
results from experiments carried out on a newly constructed re-circulating water tunnel
purpose built to investigate the effect of freshwater biofilms in hydraulic conduits. A baseline
study of boundary layer velocity profiles and total drag measurements of a specially prepared
rough test plate has been conducted to determine the plate’s roughness characteristics.
Experimental measurements from the water tunnel are complemented with three-dimensional
physical roughness data obtained from innovative photogrammetric methods. The roughness
data from the water tunnel and photogrammetry are compared and are shown to agree by
within 20%.

Item Type: Conference or Workshop Item (Paper)
Authors/Creators:Barton, AF and Sargison, JE and Walker, GJ and Osborn, JE and Brandner, PA
Keywords: Biofouling; Biofilms; Boundary layer; Roughness; Friction; Headloss; Hydraulic conduit; Hydro-electric scheme
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