Sensitivity of Approximate Deconvolution Model parameters in a posteriori LES of interfacial turbulence
Sprache des Vortragstitels:
5th International conference on Turbulence and Interactions
Sprache des Tagungstitel:
The current state of the art large eddy simulation of immiscible two-phase flows suffers from the lack of appropriate closure models for subgrid scale (SGS) contributions of interfacial physics. In this study, we extend the Approximate Deconvolution Model  to the two-phase LES with the volume of fluid method (ADM-VOF) to account for all the SGS terms appear in spatially-filtered governing equations of incompressible interfacial flows. Following the central concept of the ADM, the subgrid surface tension force and interfacial transport terms, as well as the subgrid stress tensor, are reconstructed by approximating the inverse of filter operation. Accordingly, the filtered Navier-Stokes equations, as well as the filtered VOF equation, are closed and solved using the two-phase finite volume solver in OpenFOAM. In our recent investigation, the ADM-VOF formulation is developed in detail, and employed for an a posteriori LES on the phase inversion benchmark problem. In the present study, the sensitivity of the simulation results to the ADM parameters such as size and type of filter kernels as well as the level of deconvolution is investigated. The results clearly reveal the potentials of the structural approach of ADM-VOF for large eddy simulation of interfacial turbulence where functional SGS closures are almost impractical.