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| Optimization study of Multi-Block interface structure based on Lattice Boltzmann Method |
| Received:October 05, 2017 Revised:December 25, 2017 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20171005003 |
| KeyWord:Lattice Boltzmann Method Multi-Block interpolation plan flow around cylinder driven flow of cavity numerical simulation |
| Author | Institution |
| 孙丽萍 |
哈尔滨工程大学 船舶工程学院, 哈尔滨 |
| 陆程 |
哈尔滨工程大学 船舶工程学院, 哈尔滨 |
| 王志凯 |
哈尔滨工程大学 船舶工程学院, 哈尔滨 |
| 戴绍仕 |
哈尔滨工程大学 船舶工程学院, 哈尔滨 |
| 付国强 |
哈尔滨工程大学 船舶工程学院, 哈尔滨 |
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| Abstract: |
| An optimal plan of mesh interface between the coarse and fine mesh of Multi-Block method is proposed based on the Lattice Boltzmann Method in this paper.Three key problems in the original mesh interface are effectively solved,namely,the problem of complex programming due to two sets of interpolation operations,memory waste caused by the flow data of the several past time steps is stored for the time interpolation,and accumulative interpolation error due to spatial interpolated interpolation.A new kind of coarse mesh overlapping is developed,in which the interpolation of the original space and time is simplified into a spatial interpolation by means of two-dimensional multi-point spatial interpolation.Classic examples of unsteady flow around a circular cylinder and driven flow of square cavity are analysed.The continuity of mass,momentum and stress at the interface and smoothness of transition of the interface data are verified.The computational results show that the improved Multi-Block algorithm can realize the local mesh refinement,and further promote the application of LBM in practical engineering problems. |
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