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| Lattice Boltzmann simulation research on characteristics of flow over different walls |
| Received:August 06, 2015 Revised:April 12, 2016 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx201702014 |
| KeyWord:lattice Boltzmann method flow characteristics wall condition treatment viscous fluid field comparative analysis |
| Author | Institution |
| 李红群 |
哈尔滨工程大学 机电工程学院 哈尔滨 |
| 史冬岩 |
哈尔滨工程大学 机电工程学院 哈尔滨 |
| 王志凯 |
哈尔滨工程大学 机电工程学院 哈尔滨 |
| Wasim M. K. Helal |
哈尔滨工程大学 机电工程学院 哈尔滨 |
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| Abstract: |
| In order to investigate the flow characteristics of different walls, the vortex shedding and lift, drag coefficients induced by different walls are studied by using the lattice Boltzmann method in viscous fluid field. The flow motion is described by solving the Navier-Stokes equations using the lattice Boltzmann method(LBM) which is based on the kinetic theory. Different lattice Boltzmann schemes are adopted to deal with different walls. The plane wall is handled with the Half-way rebound boundary scheme, while the curved surface is processed in the form combining the LBM with the finite difference method (FDM). The effects that the actual physical boundary and the standard grid lines do not overlap on the computational results are included. Corresponding codes are developed, and the numerical models are verified by comparing the results with public literatures. Meanwhile, the influence of the distance of inlet and outlet boundaries to bluff body center are discussed. The comparative analysis of the results of lift, drag coefficient, Strouhal number, vorticity contours and so on is presented. And, the effect of different Reynolds numbers is investigated. It shows that the wall structures obviously impact the flow characteristics which is also seriously influenced by the Reynolds number. Generally, a plane wall responds more quickly. |
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