A multi-field two-fluid concept for the simulation of two-phase flow regime transitions


A multi-field two-fluid concept for the simulation of two-phase flow regime transitions

Oertel, R.; Schlegel, F.; Ziegenhein, T.; Lucas, D.

Multiphase flows feature a range of regimes, which can roughly be categorized into disperse and segregated flows. The past research in the simulation of multiphase flows mainly focused on establishing methods that are appropriate within a well-defined regime. This work aims at the development of a framework for the simulation of multiphase flows with largely varying interfacial length scales, allowing the simulation of flow regime transitions. The basis forms the Euler-Euler concept, which is widely accepted for the simulation of disperse flows and allows for coarse computational meshes. It is also capable to handle complete phase inversion as in stratified flows. In vertical two-phase pipe flow, small disperse elements may exist alongside larger gas structures. The goal of this work is to formulate a hybrid solution procedure which allows treating the former in terms of a probability density and the latter in an interface-resolving manner. The development of the method is conducted using the open source CFD toolbox OpenFOAM.

  • Lecture (others)
    Vortrag im Rahmen eines Gastaufenthaltes am Paul-Scherrer-Institutes, 02.12.2016, Villigen, Schweiz

Permalink: https://www.hzdr.de/publications/Publ-24511
Publ.-Id: 24511