標題: Numerical Simulation of Moving Contact Lines with Surfactant by Immersed Boundary Method
作者: Lai, Ming-Chih
Tseng, Yu-Hau
Huang, Huaxiong
應用數學系
Department of Applied Mathematics
關鍵字: Immersed boundary method;interfacial flow;Navier-Stokes equations;surfactant;moving contact line;hydrophilic drop;hydrophobic drop;wetting
公開日期: 1-十月-2010
摘要: In this paper, we present an immersed boundary method for simulating moving contact lines with surfactant. The governing equations are the incompressible Navier-Stokes equations with the usual mixture of Eulerian fluid variables and Lagrangian interfacial markers. The immersed boundary force has two components: one from the nonhomogeneous surface tension determined by the distribution of surfactant along the fluid interface, and the other from unbalanced Young's force at the moving contact lines. An artificial tangential velocity has been added to the Lagrangian markers to ensure that the markers are uniformly distributed at all times. The corresponding modified surfactant equation is solved in a way such that the total surfactant mass is conserved. Numerical experiments including convergence analysis are carefully conducted. The effect of the surfactant on the motion of hydrophilic and hydrophobic drops are investigated in detail.
URI: http://dx.doi.org/10.4208/cicp.281009.120210a
http://hdl.handle.net/11536/150017
ISSN: 1815-2406
DOI: 10.4208/cicp.281009.120210a
期刊: COMMUNICATIONS IN COMPUTATIONAL PHYSICS
Volume: 8
起始頁: 735
結束頁: 757
顯示於類別:期刊論文