Numerical simulation of a horizontal sedimentation tank considering
sludge recirculation |
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Authors: | Wei Zhang Zhihong Zou and Jun Sui |
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Institution: | 1. School of Economics and Management,BeiHang University,Beijing 100191,China 2. Guangzhou Municipal Engineering Design & Research Institute,Guangzhou 510060,China |
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Abstract: | Most research conducted on the concentration distribution of sediment in the sedimentation tank does not consider the role of the
suction dredge. To analyze concentration distribution more accurately, a suspended sediment transportation model was constructed and
the velocity field in the sedimentation tank was determined based on the influence of the suction dredge. An application model was then
used to analyze the concentration distribution in the sedimentation tank when the suction dredge was fixed, with results showing that
distribution was in accordance with theoretical analysis. The simulated value of the outlet concentration was similar to the experimental
value, and the trends of the isoconcentration distribution curves, as well as the vertical distribution curves of the five monitoring sections
acquired through simulations, were almost the same as curves acquired through experimentation. The di erences between the simulated
values and the experimental values were significant. |
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Keywords: | concentration and isoconcentration distribution suspended sediment transportation model velocity field vertical
distribution |
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