An explicit particle method for simulation of multiphase flows. (15th November 2022)

• Record Type: Journal Article
• Authors: Xiao, Huiwen; Jin, Yee-Chung; Zhao, Gang
• Is Part Of: Ocean engineering. Volume 264(2022)
• Publication Date: 2022-11-15
• Subjects: WCMPS -- WCMPE -- Multiphase flows -- R-T instability -- Oil spills -- Liquid sloshing; Ocean engineering -- Periodicals; Ocean engineering; Periodicals; 620.4162
• DOI: 10.1016/j.oceaneng.2022.112484
• Languages: English
• ISSNs: 0029-8018

Abstract

Abstract: Weakly-compressible Moving particle simulation (WCMPS) is a Lagrange meshless method that is advantageous in solving complex fluid problems. Although the accuracy can be addressed in WCMPS, instability arises due to pressure fluctuations from particle clustering. Weakly Compressible Moving Particle Explicit (WCMPE) method improved the pressure calculation and stability of WCMPS while preserving its coding system with high computational efficiency. In this study, the multiphase WCMPE method is developed with a simple density smooth technique and interface detection procedure. Several numerical cases were investigated by the multiphase WCMPE method, including Rayleigh-Taylor (R-T) instability cases with various density and viscosity ratio conditions, oil spill and oil-water sloshing experiments. In general, good agreements with analytical solutions or from experimental data were obtained in multiphase WCMPE results with negligible unphysical pressure oscillation and pressure noise points. Highlights: An explicit weakly compressible MPS method, multiphase WCMPE is developed. Multiphase WCMPE is advantageous on simple algorithm and computational efficiency. Interface detection technique favors complex geometric problems. The smooth pressure field can be reproduced in multiphase WCMPE.