Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces
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 hierarc...
| Main Authors: | , , , |
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| Format: | Article |
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Elsevier
2017
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| Online Access: | https://eprints.nottingham.ac.uk/41053/ |
| _version_ | 1848796185997869056 |
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| author | Zhou, Wenning Yan, Yuying Liu, Xunliang Liu, Baiqian |
| author_facet | Zhou, Wenning Yan, Yuying Liu, Xunliang Liu, Baiqian |
| author_sort | Zhou, Wenning |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T19:43:58Z |
| format | Article |
| id | nottingham-41053 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:43:58Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-410532020-05-04T18:33:42Z https://eprints.nottingham.ac.uk/41053/ Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces Zhou, Wenning Yan, Yuying Liu, Xunliang Liu, Baiqian 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. Elsevier 2017-02-24 Article PeerReviewed Zhou, Wenning, Yan, Yuying, Liu, Xunliang and Liu, Baiqian (2017) Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces. Advances in Engineering Software . ISSN 0965-9978 http://www.sciencedirect.com/science/article/pii/S0965997816304033 doi:10.1016/j.advengsoft.2017.02.001 doi:10.1016/j.advengsoft.2017.02.001 |
| spellingShingle | Zhou, Wenning Yan, Yuying Liu, Xunliang Liu, Baiqian Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces |
| title | Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces |
| title_full | Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces |
| title_fullStr | Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces |
| title_full_unstemmed | Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces |
| title_short | Lattice Boltzmann parallel simulation of microflow dynamics over structured surfaces |
| title_sort | lattice boltzmann parallel simulation of microflow dynamics over structured surfaces |
| url | https://eprints.nottingham.ac.uk/41053/ https://eprints.nottingham.ac.uk/41053/ https://eprints.nottingham.ac.uk/41053/ |