A DIFFUSE-INTERFACE APPROACH FOR MODELING TRANSPORT, DIFFUSION AND ADSORPTION/DESORPTION OF MATERIAL QUANTITIES ON A DEFORMABLE INTERFACE

作者：Teigen Knut Erik; Li Xiangrong; Lowengrub John; Wang Fan; Voigt Axel

来源：Communications in Mathematical Sciences, 2009, 7(4): 1009-1037.

• Partial differential equations
• diffuse interface
• interfacial dynamics
• complex geometry
• multigrid
• adaptive grid
• finite difference
• multiphase
• adsorption
• desorption

A method is presented to solve two-phase problems involving a material quantity on an interface. The interface can be advected, stretched, and change topology, and material can be adsorbed to or desorbed from it. The method is based on the use of a diffuse interface framework, which allows a simple implementation using standard finite-difference or finite-element tech niques. Here, finite-difference methods on a block-structured adaptive grid are used, and the resulting equations are solved using an on-linear multigrid method. Interfacial flow with soluble surfactants is used as an example of the application of the method, and several test cases are presented demonstrating its accuracy and convergence.

• 出版日期2009-12