Optimisation of flow through a horizontal spiral baffled filter

Ryan, Richard (2011) Optimisation of flow through a horizontal spiral baffled filter. [USQ Project]

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Abstract

This dissertation presents a solution to the phenomena of water channelling in a horizontally orientated sand filter. The aim is to find an optimal configuration of spiral baffle for a particular residence time and power input. A total of nine different spiral baffle geometries were considered.

The methodology for optimisation was to use computational fluid dynamics (CFD) software to study the flows in all nine geometries. A multiphase model was used to estimate the residence time of a volume fraction of fluid within the nine geometries. The residence time was then compared to the power input data to derive a solution.

Results show so far that by increasing the pitch the power requirement to drive the filter decreases. In addition to this as the baffle height is increased the power requirement increases also.

The spiral baffle represents a real solution to the problem of water channelling in a horizontal sand filter. One of the benefits of the spiral baffled filter could be the treatment of ground waters in developing countries. The advantage of the horizontal filter is that it could be made portable. With a portable sand filtration system the production of quality water could be achievable anywhere.


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Item Type: USQ Project
Refereed: No
Item Status: Live Archive
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Supervisors: Mossad, Ruth
Date Deposited: 07 Jan 2013 03:05
Last Modified: 03 Jul 2013 01:37
Uncontrolled Keywords: spiral baffled filter, water channelling
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090509 Water Resources Engineering
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
URI: http://eprints.usq.edu.au/id/eprint/22629

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