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Numerical simulation and PIV test of internal flow field in paddle stirred tank |
Wang Chunlin, Lü Yayun, Shi Yating, Ding Jian, Li Changjun |
(School of Energy and Power Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China) |
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Abstract 3D flow field of mixing process in an agitator tank was simulated by using Multiple Reference Frame (MRF) and standard k-εmodel, and the liquid flow status in the mixing tank was analyzed. In order to verify that the impellers can mix the liquid effectively, velocity distribution of vertical surface and horizontal surface were studied respectively. Meanwhile, PIV was used to study and discuss the real flow condition in the agitator tank. The experimental data of velocity distribution on agitator tank liquid level, impeller inflow area, impeller discharge area and tank bottom area are contrasted with the simulation results. It is discovered that the axial speed increasing trend obtained from numerical simulation is quite agreement with that of the experiment, while the point of highest speed has some difference: on tank bottom area the two results are consistent, and the highest speed of simulation on impeller discharge and impeller inflow region is lower 12.8%and 14.2% than that of experiment respectively, and on tank liquid level the two results are quite different. So the forecast function of the numerical simulation for experimental study was validated. This provides some useful reference for type election and design of agitator.
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Received: 08 July 2009
Published: 30 July 2010
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