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首页> 外文期刊>Advances in Engineering Software >Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces
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Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces

机译：晶格玻尔兹曼结构表面微流动力学的并行模拟

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In the present work, a parallel lattice Boltzmann multiphase model was developed to investigate the effects of surface structures on wettabilities and flow dynamics in a microchannel. The theory of wetting transition was firstly discussed. Then three types including triangular, rectangle and hierarchical shaped microstructures were constructed on the surface to examine the effects on wettabilities and drag reduction. It was found that flow behaviour is strongly affected by the surface morphology of the channel. The results indicated that hierarchical structures on the surface could improve the hydrophobicity significantly. For rectangular structures, they can improve the hydrophobicity with the increase of height and distance ratio h/d of the structures, and the improvement will reach its optimal hydrophobicity when the value h/d is over a certain value of 0.6. Moreover, to accelerate computational speed, the Open Multi-Processing (OpenMP) was employed for the parallelization of the model. A maximum speedup of 2.95 times was obtained for 4 threads on a multi-core CPU platform.
机译：在目前的工作中，开发了平行晶格玻尔兹曼多相模型来研究表面结构对微通道中润湿性和流动动力学的影响。首先讨论了润湿转变理论。然后在表面上构造了三角形，矩形和分层形状的三种类型的微结构，以研究其对润湿性和减阻的影响。发现流动行为受通道表面形态的强烈影响。结果表明，表面上的分层结构可以显着改善疏水性。对于矩形结构，它们可以随着结构的高度和距离比h / d的增加而改善疏水性，并且当h / d的值超过0.6时将达到最佳疏水性。此外，为了加快计算速度，采用了Open Multi-Processing（OpenMP）进行模型的并行化。在多核CPU平台上，四个线程的最大加速速度为2.95倍。

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