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Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces

Zhou, Wenning; Yan, Yuying; Liu, Xunliang; Liu, Baiqian

Authors

Wenning Zhou

Yuying Yan

Xunliang Liu

Baiqian Liu



Abstract

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.

Journal Article Type Article
Journal Advances in Engineering Software
Print ISSN 0965-9978
Electronic ISSN 0965-9978
Publisher Elsevier
Peer Reviewed Peer Reviewed
APA6 Citation Zhou, W., Yan, Y., Liu, X., & Liu, B. (in press). Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces. Advances in Engineering Software, doi:10.1016/j.advengsoft.2017.02.001
DOI https://doi.org/10.1016/j.advengsoft.2017.02.001
Publisher URL http://www.sciencedirect.com/science/article/pii/S0965997816304033
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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