Thursday, September 27, 2018
11:00-11:50 am, Room SH 203
Zhicheng Wang (MIT)
Title: A phase-field method for large-eddy simulation of two-phase slug flow in a horizontal pipe
Abstract. We present a phase-field method that are capable of large-eddy simulation (LES) of the initial- ization and development of the two-phase slugs from a stratified flow in a long horizontal pipe using realistic parameters of density ratio, viscosity ratio, Weber number and Reynolds number. The method is implemented both in a three-dimensional spectral-elment and a spectral-element/Fourier code that make the simulation be fast with a high accuracy. The free interface is solved by the Cahn-Hilliard equation that leads to excellent mass conservation. The Entropy Viscosity Method (EVM) is employed as LES subgrid eddy viscosity model. The visualization of the simulation re- sult exhibits the richness of the evolving topology of the slugs, while the predicted slug length and frequency are in good agreement with experimental measurements.