Direct simulation of drying colloidal suspension on substrate using immersed free surface model

JOURNAL OF COMPUTATIONAL PHYSICS

卷:281

Article

Fujita, Masahiro¹  Koike, Osamu²  Yamaguchi, Yukio² 

[1] Josai Univ, Dept Math, Tokyo 1020093, Japan

[2] Univ Tokyo, Dept Chem Syst Engn, Tokyo 1138656, Japan

关键词: Colloidal suspension;    Free surface;    Phase change;    Immersed free surface model;    Immersed boundary method;    Level set method;   

DOI  :  10.1016/j.jcp.2014.10.042

来源: Elsevier

【 摘 要 】

This paper presents a new direct simulation method for a drying colloidal suspension on a substrate. A key issue of the present method is the immersed free surface model proposed by the authors, which enables us to estimate accurately and efficiently capillary forces exerted on particles on a free surface. Using the immersed free surface model along with immersed boundary method and level set method, the present method leads to a three-way coupling of the fluid flow, the free surface motion and the particle motion. In addition, the present method includes a way of curvature estimation using virtual grid differencing to calculate accurately a surface tension. The way of curvature estimation is quantitatively validated through the simulation of a still droplet. The immersed free surface model is quantitatively validated through the simulation of a sphere moving across a free surface and the simulation of two spheres moving along a free surface. Finally, simulations of drying colloidal suspension containing 130 particles are performed to demonstrate the applicability of the present method to actual systems. (C) 2014 The Authors. Published by Elsevier Inc.

【 授权许可】

Free