2017年12月
Smoothed profile-lattice Boltzmann method for non-penetration and wetting boundary conditions in two and three dimensions
COMPUTERS & FLUIDS
- ,
- ,
- 巻
- 159
- 号
- 開始ページ
- 64
- 終了ページ
- 80
- 記述言語
- 英語
- 掲載種別
- 速報,短報,研究ノート等(学術雑誌)
- DOI
- 10.1016/j.compfluid.2017.09.012
- 出版者・発行元
- PERGAMON-ELSEVIER SCIENCE LTD
In this study, the smoothed profile-lattice Boltzmann method (SP-LBM) is proposed to determine the contact line dynamics on a hydrophobic or a hydrophilic curved wall. Two types of smoothed indicator functions are introduced, namely a function that identifies the solid domain for non-slip and non-penetration conditions and a function that denotes the boundary layer for no mass-flux and the wetting boundary conditions. In order to prevent fluid penetration into the solid boundary, the fluid-solid interaction force is computed based on the definition of the fluid velocity as proposed by Guo et al. [1]. In order to implement the Neumann boundary conditions for the order parameter and the chemical potential, the fluxes from the solid surfaces are distributed to relevant physical valuables through a smoothed profile. Several two-dimensional and three-dimensional numerical investigations including those determining the Couette flows, flow around a circular cylinder, transition layer on a wetting boundary, and dynamic behavior of a droplet on a flat or curved plate demonstrate the efficiency of the present method in calculating the contact angle of a droplet on curved surfaces with wall impermeability. The present model provides a simple algorithm to compute the surface normal vector and contact line dynamics on an arbitrarily shaped boundary by using a smoothed-profile. (C) 2017 Elsevier Ltd. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.compfluid.2017.09.012
- ISSN : 0045-7930
- eISSN : 1879-0747
- Web of Science ID : WOS:000417658600006