This development is further maintained under the following software publication: https://doi.org/10.14278/rodare.767

A solver for multiphase flows based on the incompressible Eulerian multi-field two-fluid model for the OpenFOAM release of The OpenFOAM Foundation for numerical simulations of multiphase flows with morphology changes and resolved interfaces.

Features:

morphology adaptive modeling framework for modelling of dispersed and resolved interfaces based on Eulerian multi-field two-fluid model
compact interpolation method according to Cubero et al. (Comput Chem Eng, 2014, Vol. 62, 96-107), including virtual mass
numerical drag according to Strubelj and Tiselj (Int J Numer Methods Eng, 2011, Vol. 85, 575-590) to describe resolved interfaces in a volume-of-fluid like manner
n-phase partial elimination algorithm for momentum equations to resolve strong phase coupling
bubble induced turbulence model of Ma et al. (Phys Rev Fluids, 2017, Vol. 2, 034301)
turbulent wall functions of Menter according to Rzehak & Kriebitzsch (Int J Multiphase Flow, 2015, Vol. 68, 135–152)
free surface turbulence damping for k-ω SST (symmetric and asymmetric damping, Frederix et al., Nucl Eng Des, 2018, Vol. 333, 122-130)
dynamic time step adjustment via PID controller
selected test cases:

    a two-dimensional gas bubble, rising in a liquid, which is laden with micro gas bubbles, and
    a two-dimensional stagnant stratification of water and oil, sharing a large-scale interface
    a two-dimensional stratified flow based on WENKA experiment (Stäbler, Ph.D. thesis, 2007)

This work was supported by the Helmholtz European Partnering Program in the project "Crossing borders and scales (Crossing)".

{"references": ["Meller, R, Schlegel, F, Lucas, D. Basic verification of a numerical framework applied to a morphology adaptive multifield two\u2010fluid model considering bubble motions. Int J Numer Meth Fluids. 2020; 1\u2013 26. https://doi.org/10.1002/fld.4907"]}