Calculation of separated, nonstationary, two dimensional, turbulent flows around bluff bodies using Reynolds stress closure turbulence modeling
Abstract
Separated, turbulent flows are calculated using a Reynolds stress closure model. The model consists of transport equations for each of the Reynolds stress components and for the volume integral of the twopoint correlation function. Several alternate forms of model terms in the Reynolds stress transport equations which have been proposed are considered in order to assess their effects in separated flow calculations. The calculations are performed on two dimensional flows. The mean momentum equations are solved using vorticity  stream function coordinates. The computations are carried out with an explicit finite difference method capable of handling time dependent flow problems. The backward facing step calculations show the Mellor turbulence model to perform well compared to other popular turbulence models. The flow around a bluff plate normal to the flow is also investigated, and compared to experimental results. This flow is of interest since it exhibits unsteady shedding in the near wake, and the applicability of Reynolds stress closure models to flows of this type has not been established.
 Publication:

Ph.D. Thesis
 Pub Date:
 1987
 Bibcode:
 1987PhDT........43S
 Keywords:

 Bluff Bodies;
 Computational Fluid Dynamics;
 Separated Flow;
 Turbulent Diffusion;
 Turbulent Flow;
 Two Dimensional Flow;
 Vortex Shedding;
 Correlation;
 Cross Flow;
 Finite Difference Theory;
 Reynolds Stress;
 Turbulence Models;
 Fluid Mechanics and Heat Transfer