- 著者
-
Takada Naoki
Tomiyama Akio
- 出版者
- 一般社団法人日本機械学会
- 雑誌
- JSME international journal. Ser. B, Fluids and thermal engineering (ISSN:13408054)
- 巻号頁・発行日
- vol.49, no.3, pp.636-644, 2006-08-15
- 被引用文献数
-
7
24
For interface-tracking simulation of incompressible two-phase fluids with high density ratios, a new numerical method was proposed by combining Navier-Stokes equations with a phase-field model based on a van der Waals-Cahn-Hilliard free-energy theory. The method was applied to several benchmark problems. Major findings are as follows: (1) The volume flux derived from a local chemical potential gradient in the Cahn-Hilliard equation leads to accurate volume conservation, autonomic reconstruction of gas-liquid interface, and reduction of numerical diffusion and oscillation. (2) The proposed method gave good predictions of pressure increase inside a bubble caused by the surface tension force. (3) A single liquid drop falling in stagnant gas and merging into a stagnant liquid film was successfully simulated.