Next Article in Journal
A Potential Field Description for Gravity-Driven Film Flow over Piece-Wise Planar Topography
Next Article in Special Issue
Baropycnal Work: A Mechanism for Energy Transfer across Scales
Previous Article in Journal
Experimental Study of a Gas–Liquid Flow in Vacuum Air-Lift Column Using an Optical Bi-Probe
Previous Article in Special Issue
A Relaxation Filtering Approach for Two-Dimensional Rayleigh–Taylor Instability-Induced Flows
Open AccessArticle

Turbulence Model Assessment in Compressible Flows around Complex Geometries with Unstructured Grids

High Performance Computing and Visualization Laboratory, Department of Mechanical Engineering, University of Puerto Rico, Mayaguez, PR 00681, USA
Fluids 2019, 4(2), 81; https://doi.org/10.3390/fluids4020081
Received: 23 February 2019 / Revised: 7 April 2019 / Accepted: 15 April 2019 / Published: 28 April 2019
(This article belongs to the Special Issue Multiscale Turbulent Transport)
One of the key factors in simulating realistic wall-bounded flows at high Reynolds numbers is the selection of an appropriate turbulence model for the steady Reynolds Averaged Navier–Stokes equations (RANS) equations. In this investigation, the performance of several turbulence models was explored for the simulation of steady, compressible, turbulent flow on complex geometries (concave and convex surface curvatures) and unstructured grids. The turbulence models considered were the Spalart–Allmaras model, the Wilcox k- ω model and the Menter shear stress transport (SST) model. The FLITE3D flow solver was employed, which utilizes a stabilized finite volume method with discontinuity capturing. A numerical benchmarking of the different models was performed for classical Computational Fluid Dynamic (CFD) cases, such as supersonic flow over an isothermal flat plate, transonic flow over the RAE2822 airfoil, the ONERA M6 wing and a generic F15 aircraft configuration. Validation was performed by means of available experimental data from the literature as well as high spatial/temporal resolution Direct Numerical Simulation (DNS). For attached or mildly separated flows, the performance of all turbulence models was consistent. However, the contrary was observed in separated flows with recirculation zones. Particularly, the Menter SST model showed the best compromise between accurately describing the physics of the flow and numerical stability. View Full-Text
Keywords: Navier–Stokes equations (RANS); Direct Numerical Simulation (DNS); turbulence models; compressible flow Navier–Stokes equations (RANS); Direct Numerical Simulation (DNS); turbulence models; compressible flow
Show Figures

Figure 1

MDPI and ACS Style

Araya, G. Turbulence Model Assessment in Compressible Flows around Complex Geometries with Unstructured Grids. Fluids 2019, 4, 81.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map

1
Back to TopTop