Validation of Turbulence Models for Separated Flow over 3D BeVERLI Hill Bump Oriented at 30 Degree

Validation of turbulence models is crucial for assessing their reliability and identifying areas for improvement. The focus of this study is on the VT-NASA CFD Turbulence Model Validation Challenge-the three-dimensional smooth-body turbulent flow separation over the BeVERLI hill model. Wind tunnel tests have previously been conducted on this model for subsonic flow at Reynolds numbers of 250,000 and 650,000, providing detailed experimental data for zero-and forty-five-degree orientations of the model with respect to the free stream. In this blind validation test case, the present study investigates the BeVERLI hill bump flow field at thirty-degree orientation using the Reynolds-Averaged Navier-Stokes (RANS) equations. The Spalart-Allmaras (SA) one-equation model, the Menter’s SST k-ω two-equation model, and the Wray-Agarwal (WA) one-equation turbulence model are employed with the RANS equations for numerical simulations using the commercial CFD software ANSYS Fluent. The study analyzes and compares the results for surface pressure, skin friction, and velocity field employing the three turbulence models on a series of grid levels. The results are presented in two parts: Part I provides results for the pressure coefficient Cp and the skin-friction coefficient Cf on the bump along the x-direction and compares them both in the grid-wise and model-wise direction. Part II provides results at selected model locations as required by Dr. Chris Roy of Virginia Tech for the blind competition.