Sensitivity of Approximate Deconvolution Model Parameters in a Posteriori LES of Interfacial Turbulence

The current state of the art of 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 [1] to the two-phase LES with volume of fluid method (ADM-VOF) to account for all the SGS terms appearing 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 [2], the ADM-VOF formulation is developed into details, 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 approximation order of the inverse filter are 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.