Development of an interface thickening method for the direct numerical simulation of compressible liquid-vapor flows in the framework of the Second Gradient theory - Archive ouverte HAL Accéder directement au contenu
Pré-Publication, Document De Travail Année : 2018

Development of an interface thickening method for the direct numerical simulation of compressible liquid-vapor flows in the framework of the Second Gradient theory

Résumé

This study presents a method to perform Direct Numerical Simulation, in the sense of turbulence, of two-phase flows with interfaces. It is based on the compressible diffuse interface model introduced by the Second Gradient theory. This model assumes a continuous variation of the thermodynamic variables in the interface and add to their description a dependency on the density gradient. The interface widths as predicted by the model fall way below the typical relevant turbulent scales. We propose here a thermodynamically consistent method to thicken the interface in order to perform calculations on typical DNS meshes. The modified model has been integrated and validated on canonical isothermal interfaces. Its extension to non isothermal cases is also investigated.
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Dates et versions

hal-01809166 , version 1 (06-06-2018)

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  • HAL Id : hal-01809166 , version 1

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Davy Nayigizente, Schmitt Thomas, Sébastien Ducruix. Development of an interface thickening method for the direct numerical simulation of compressible liquid-vapor flows in the framework of the Second Gradient theory. 2018. ⟨hal-01809166⟩
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