Assessment of an approach to generating inflow synthetic turbulence for large eddy simulations of complex turbulent flows

Abstract

An approach to generating in §ow synthetic turbulence recently developed by the authors has been applied to zonal Reynolds-Averaged Navier Stokes (RANS) / Large Eddy Simulations (LES) of two complex turbulent §ows: §ow over a wall-mounted hump and hydrofoil trailing edge §ow, and to a LES of a §ow in a three-dimensional (3D) di¨user. The results show that the zonal RANS-LES approach with synthetic turbulence at the interface is in excellent agreement with experimental data for hump and trailing edge §ows. For the di¨user §ow, it is shown that results depend signi¦cantly on the RANS model used to provide averaged velocity and Reynolds stresses at the inlet.

A study of unsteady hydrodynamic effects in the stern area of river cruisers in shallow water

“…An important aspect of application of scale-resolving methods is the generation of the turbulent content. In the present work this was done using the modal turbulence generator, proposed in [1]. The turbulence generator in form of the momentum source was placed at a distance of 2(h − T ) upstream from the end of the parallel middle body at the stern (see Figure 3).…”