Mark Sussman
Professor of Mathematics,
Florida State University

"A coupled level set and continuous moment-of-fluid method for simulating multiphase flows with phase change"

Nov 30, 2022, Schedule:

Nespresso & Teatime 417 DSL - Commons

 

03:00 to 03:30 PM Eastern Time (US and Canada)

Colloquium - F2F  499 DSL / Virtual Zoom

 

03:30 to 04:30 PM Eastern Time (US and Canada)

Click Here to Join via Zoom
Meeting # 942 7359 5552

Meeting # 942 7359 5552

Abstract:

An improved algorithm for computing multimaterial/multi-phase flows is presented in which the multimaterial Moment-Of-Fluid (MOF) algorithm for multiphase flows, initially described by Li et al (2015), is enhanced addressing existing MOF difficulties in computing solutions to problems in which surface tension forces are crucial for understanding salient flow mechanisms. The Continuous Moment of Fluid (CMOF) method is introduced in this article. The CMOF reconstruction method inherently removes the "checkerboard instability" that persists when using the MOF method on surface tension driven multiphase/multimaterial flows. The new CMOF reconstruction algorithm is accelerated by coupling the CMOF method to the level set method and coupling the CMOF method to the Decision Tree machine learning algorithm.

Multiphase flow examples are shown in 2D, RZ, and 3D. Examples include two material and three material multiphase flows: bubble formation, phase change in a cryogenic fuel tank, freezing, and liquid lens dynamics.

The attached figure is a simulation of a jet impinging the bubble ullage in a cryogenic fuel tank.