Estimation of Volume-of-Fluid Method with Level Set Function under Stable and Unstable Interface Conditions
under review
- It is necessary to consider the nonlinear effects such as inertia force, gravity, viscosity, and surface tension on interface stability to understand the instability mechanism of an interface between two fluid layers comprehensively. Our study thus focuses on the viscosity’s impact on the interface stability of viscosity fluids by comparing the linear stability theory to the modified S-CLSVOF method. Our results show that when the relative velocity (U) between the two fluid layers is below a particular critical value determined by the Kelvin-Helmholtz instability (KHI) theory, the waves at the interface do not exhibit divergence, i.e., the shape of waves remain stable and undistorted. Conversely, when U significantly exceeds the critical value established by the KHI theory, the waves become highly distorted and unstable. In addition, U has non-linear advection effects in the momentum equation and could distort the waves.
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| Author: | Sato Mako, Naoki Shimada, Yuta Yaegashi, Thorsten KochORCiD, Thi Thai LeORCiD |
|---|---|
| Document Type: | Article |
| Parent Title (English): | Journal of Chemical Engineering of Japan |
| Year of first publication: | 2024 |
