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Date of Publication:2022-10-10

Journal:水动力学研究与进展A辑

Volume:28

Issue:6

Page Number:717-723

ISSN No.:1000-4874

Abstract:In this paper, a new lattice Boltzmann method in non-slip boundary condition is proposed aimed to handle the curved boundary condition. The method is first to predict distribution function (DF) for the boundary nodes by a first order extrapolation, and then DF of the wall nodes is obtained using the non-equilibrium extrapolation, finally the predicted DF is corrected by interpolating the DF of the wall nodes and the corresponding extrapolated flow nodes. The interpolation form is unified and the non-slip curved boundary condition is achieved exactly. The present method is applied to simulate the problems of flow around a static, a rotational and a VIV circular cylinder. Calculation results are in good agreement with other findings and manifest the veracity and effectiveness of current method. And it is found that this method can also be applied to the DF calculation of new flow nodes from the moving boundary problems.

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