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Type: Journal article
Title: Numerical simulation of fluid dynamics in the stirred tank by the SSG Reynolds Stress Model
Author: Qi, N.
Wang, H.
Zhang, K.
Zhang, H.
Citation: Frontiers of Chemical Engineering in China, 2010; 4(4):506-514
Publisher: Gaodeng Jiaoyu Chubanshe
Issue Date: 2010
ISSN: 1673-7369
Statement of
Nana Qi, Hui Wang, Kai Zhang and Hu Zhang
Abstract: The Speziale, Sarkar and Gatski Reynolds Stress Model (SSG RSM) is utilized to simulate the fluid dynamics in a full baffled stirred tank with a Rushton turbine impeller. Four levels of grid resolutions are chosen to determine an optimised number of grids for further simulations. CFD model data in terms of the flow field, trailing vortex, and the power number are compared with published experimental results. The comparison shows that the global fluid dynamics throughout the stirred tank and the local characteristics of trailing vortices near the blade tips can be captured by the SSG RSM. The predicted mean velocity components in axial, radial and tangential direction are also in good agreement with experiment data. The power number predicted is quite close to the designed value, which demonstrates that this model can accurately calculate the power number in the stirred tank. Therefore, the simulation by using a combination of SSG RSM and MRF impeller rotational model can accurately model turbulent fluid flow in the stirred tank, and it offers an alternative method for design and optimisation of stirred tanks.
Keywords: stirred tank; fluid dynamics; numerical simulation; SSG Reynolds Stress Model; MRF
Rights: Copyright Higher Education Press and Springer-Verlag Berlin Heidelberg 2010
RMID: 0020101302
DOI: 10.1007/s11705-010-0508-7
Appears in Collections:Chemical Engineering publications

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