Assessment of reynolds stress turbulence closures in the calculation of a transonic separated flow

Abstract

In this study, the performances of various turbulence closure models are evaluated in the calculation of a transonic flow over axisymmetric bump, k-€, explicit algebraic stress, and two Reynolds stress models, i. e., GL model proposed by Gibson & Launder and SSG model proposed by Speziale, Sarkar and Gatski, are chosen as turbulence closure models. SSG Reynolds stress model gives best predictions for pressure coefficients and the location of shock. The results with GL model also show quite accurate prediction of pressure coefficients downstream of shock wave. However, in the predictions of mean velocities and turbulent stresses, the results are not so satisfactory as in the prediction of pressure coefficients.

Eulerian–Eulerian RSTM-PDF Modeling of Turbulent Particulate Flow

“…The RSTM approach allows for completely analyzing the influence of particles on the longitudinal, radial, and azimuthal components of the turbulence kinetic energy, including possible modifications of the cross-correlation velocity moments. Several studies based on the RSTM approach produced accurate results and demonstrated the ability of the method to simulate complex flows [12,13], as well as turbulent transonic [14], supersonic [15], and viscoelastic flows [16]. Taulbee et al [12] used the RSTM approach to calculate the particle-laden shear flow by applying the direct numerical simulation (DNS) and the small Reynolds number was used in their simulation, Re = 952.…”

Two-Fluid RANS-RSTM-PDF Model for Turbulent Particulate Flows

“…A number of studies based on the RSTM approach showed its good performance and capability for simulation of the complicated flows [3], as well for the turbulent subsonic [4] and supersonic flows [5] and viscoelastic flows [6].…”