Interface capturing in compressible two-phase flows with non-equilibrium models

ORAL

Abstract

The applications of compressible multiphase flows in aerospace applications are numerous. The target is to develop a robust framework to model two phases and preserve interfaces in a compressible turbulent regime. Non-equilibrium models, namely six- and seven-equation, are of interest here because of more accurate wave transmission across interfaces. One approach to capture interfaces with low-dissipative central schemes is to add interface-sharpening terms; moreover, shock and contact-discontinuity capturing may also be achieved with the use of artificial-viscosity approaches. Analogous formulations already developed for four- and five-equation model approaches are extended to these non-equilibrium models by adding the general conservative interface-capturing term based on the phase-field method in the volume fraction transport equation and consistently incorporating the corresponding terms to the phasic conservation equations. The novel formulation is tested for canonical test cases such as two-phase shock-tube and droplet advection problems.

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Presenters

  • Luis H Hatashita

    Flow Physics and Computational Science Lab, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA, Georgia Institute of Technology, Flow Physics and Computational Sciences Lab

Authors

  • Luis H Hatashita

    Flow Physics and Computational Science Lab, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA, Georgia Institute of Technology, Flow Physics and Computational Sciences Lab

  • Suhas Jain

    Woodruff School of Mechanical Engineering, Georgia Institute of Technology, USA. Center for Turbulence Research, Stanford Universty, USA, Georgia Institute of Technology, Flow Physics and Computational Sciences Lab, Woodruff School of Mechanical Engineering, Georgia Tech, Flow Physics and Computational Science Lab, Georgia Institute of Technology, Atlanta, Georgia, 30332, USA, Woodruff School of Mechanical Engineering, Georgia Institute of Technology; Center for Turbulence Research, Stanford University, George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA