Performance investigation of 2D lattice Boltzmann simulation of forces on a circular cylinder |
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| Authors: | CHEN Tongqing ZHANG Qinghe CHENG Liang |
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| Institution: | CHEN Tongqing 1,2,ZHANG Qinghe 1,CHENG Liang 3 (1. School of Civil Engineering,Tianjin University,Tianjin 300072,China,2. Key Laboratory of Harbor and Ocean Engineering,Ministry of Education of China,3. School of Civil and Resource Engineering,The University of Western Australia,Crawley,WA 6009,Australia) |
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| Abstract: | The lattice Boltzmann method (LBM) is employed to simulate the uniform flow past a circular cylinder. The performance of the
two-dimensional LBM model on the prediction of force coefficients and vortex shedding frequency is investigated. The local
grid refinement technique and second-order boundary condition for curved walls are applied in the calculations. It is found
that the calculated vortex shedding frequency, drag coefficient and lift coefficient are consistent with experimental results
at Reynolds numbers lower than 300. For the high Reynolds number flow, although the simulation by the combined model of LBM
and large eddy simulation method is numerically stable, the simulated results deviate from those of experiments, similar to
the reported results by conventional numerical methods. It is suggested that this is mainly due to the three-dimensionality
of the flow. |
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| Keywords: | lattice Boltzmann method flow past a circular cylinder large eddy simulation grid refinement secondorder curved boundary treatment drag and lift coefficients |
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