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HZDR Multiphase Addon for OpenFOAM

Schlegel, Fabian; Draw, Mazen; Evdokimov, Ilya; Hänsch, Susann; Khan, Harris; Lehnigk, Ronald; Meller, Richard; Petelin, Gašper; Tekavčič, Matej

Other(s)
Couteau, Arthur; Colombo, Marco; Kriebitzsch, Sebastian; Parekh, Jigar

The HZDR multiphase addon contains additional code for the open-source CFD software OpenFOAM, released by The OpenFOAM Foundation. The developments are dedicated to the numerical simulation of multiphase flows, in particular to the multi-field two-fluid model (Euler-Euler method). Within the OpenFOAM library the multiphaseEulerFoam framework is used for this type of simulation. The addon contains a modified multiphaseEulerFoam named HZDRmultiphaseEulerFoam with the full support of the HZDR baseline model set for polydisperse bubbly flows according to Liao et al. (Chem Eng Sci, 2019, Vol. 202, 55-69). In addition a solver dedicated to a hybrid modelling approach (dispersed and resolved interfaces, Meller et al., Int J Numer Meth Fluids. 2020, 1-26) named cipsaMultiphaseEulerFoam is provided with the addon. This solver has an interface to the multiphaseEulerFoam framework and utilizes all available interfacial models of it.

General enhancements

HZDRmultiphaseEulerFoam

cipsaMultiphaseEulerFoam

  • 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
  • free surface turbulence damping for k-ω SST (symmetric and asymmetric damping, Frederix et al., Nucl Eng Des, 2018, Vol. 333, 122-130)
  • selected tutorial 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 the 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)"
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  • Meller, R., Schlegel, F., & Lucas, D. (2020). Basic verification of a numerical framework applied to a morphology adaptive multifield two‐fluid model considering bubble motions. International Journal for Numerical Methods in Fluids.

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