Numerical Simulation of Sedimentation Tanks Using the LES Model

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Sajjadian, Mohammad | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 46785 (08)
University: Sharif University of Technology
Department: Mechanical Engineering
Advisor(s): Afshin, Hossein; Firoozabadi, Bahar
Abstract:
In the present study, hydrodynamics and particle sedimentation of a rectangular basin is studied numerically. Results are also validated with experimental data. Two major goals are perused in this work: First comparing LES and RNG k-ϵ turbulence models and second, investigating the accuracy of simulation of particle sedimentation by solving the concentration formula.
In order to achieve these goals, a 2D sedimentation tank is simulated using the RNG k-ϵ model. Velocity and concentration profiles are also plotted. Comparing the results with experimental data reveals that simulating sedimentation by the mentioned method has acceptable accuracy and can be used to predict sedimentation. In order to make a comparison between turbulence models, the tank is also studied three dimensionally using the LES model. Results show that LES can predict flow patterns more accurately than the RNG k-ϵ model
Keywords:
Settling Tank ; Numerical Simulation ; Large Eddy Simulation (LES) ; Turbulence Model

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