Experimental and Computational Study of 2D Smooth Wall Turbulent Boundary Layers in Pressure Gradient

Modeling of high-Re, incompressible, non-equilibrium, rough-wall boundary layers for naval applications under NATO-AVT349

“…The CFD-driven approach [45] is one such method and is attractive as the resulting models have been tested in their ultimate, a-posteriori, environment. This approach is viable for statistically two dimensional flows, such as the pressure gradient boundary layers measured in the Virginia Tech wind tunnel and reported in another paper related to the AVT-349 activities [48], due to the low cost of each RANS run. However, for more complex three-dimensional flows, having to perform hundreds or thousands of RANS calculations in the closure training becomes prohibitively computationally expensive.…”

Comparison of RANS Turbulence Models for the Simulation of Smooth Wall Boundary-Layers in Pressure Gradients at Moderate and High Reynolds Numbers

“…The pressure gradient imposed to the boundary-layers is induced by a rectangular wing with a NACA 0012 section placed in the middle of a wind tunnel at angles of attack ranging between -10 and 12 degrees. A comparison of simulations performed by several RANS flow solvers using different turbulence models with the experimental data has been reported in [2]. The study reported in [2] assumed a two-dimensional geometry and the proposed computational domain included a tilted top wall to take into account the displacement thickness of the side walls boundary-layers.…”

“…In this work, our focus is to assess the Reynolds number effect on the performance of different RANS turbulence models in the simulation of viscous flows. To this end, we have selected the experiments reported in [1] at angles of attack of -10, 0 and 12 degrees and the two-dimensional domain proposed in [2] to simulate the flows at Reynolds numbers of 𝑅𝑒 = 2 × 10 and 𝑅𝑒 = 10 using four RANS turbulence models: the one-equation, eddy-viscosity Spalart & Allmaras model; the two-equation, eddy-viscosity 𝑘 − 𝜔 SST model; the two-equation, eddy-viscosity 𝑘 − √𝑘𝐿 model and the sevenequation, Reynolds Stress SSG-LRR−𝜔 model. The goal of the study is to quantity the differences between the results obtained with the four turbulence models at model scale (𝑅𝑒 = 2 × 10 ) and full scale (𝑅𝑒 = 10 ) numbers.…”