The BeVERLI Hill three-dimensional separating flow case: cross-facility comparisons of validation experiment results

Duetsch-Patel, Julie E.; MacGregor, Daniel; Jenssen, Yngve L.; Henry, Pierre-Yves; Muthanna, Chittiappa; Savio, Luca; Lavoie, Philippe; Gargiulo, Aldo; Sundarraj, Vignesh; Ozoroski, Thomas A.; Roy, Christopher J.; Devenport, William J.; Borgoltz, Aurélien; Lowe, K. Todd

doi:10.2514/6.2022-0698

Cited by 7 publications

(1 citation statement)

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“…To investigate the latter point, an ongoing effort is currently dedicated at reproducing and quantitatively cross-comparing the VT experiment across multiple experimental facilities around the globe. In [68] a qualitative comparison of the experimental solution has been completed and found to be consistent across facilities. Future work will be also dedicated to investigations with unsteady RANS (URANS), LES, and hybrid methods, which might open new avenues and interesting pathways for the BeVERLI Hill validation case.…”

Section: F Qualitative Cross-comparisonmentioning

confidence: 97%

Computations of the BeVERLI Hill Three-dimensional Separating Flow Model Validation Cases

Gargiulo

Ozoroski

Hallock

et al. 2022

AIAA SCITECH 2022 Forum

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The BeVERLI (Benchmark Validation Experiment for RANS/LES Investigations) Hill project aims at producing a detailed experimental database of three-dimensional non-equilibrium turbulent boundary layers with various levels of separation while meeting the most exacting requirements of computational fluid dynamics validation as per Oberkampf and Smith [1]. A group of the Science and Technology Organization (STO) of the North Atlantic Treaty Organization (NATO) entitled NATO AVT-349 -"Non-Equilibrium Turbulent Boundary Layers in High Reynolds Number Flow at Incompressible Conditions" has recently considered the BeVERLI Hill case. Their goal is to advance the accuracy and range of prediction models for high Reynolds number non-equilibrium boundary layers. This highly collaborative and international group comprised of various academic, governmental, and industrial institutions has performed several Reynolds-averaged Navier-Stokes (RANS) simulations of the BeVERLI Hill using different grids, solvers, and turbulence models. The resulting solutions and available experimental data are presented in this paper to summarize and highlight key features, sensitivities, and the current predictive capability of RANS for the BeVERLI Hill case. The results suggest important sensitivities to Reynolds number, grid density, iterative converge,

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Section: F Qualitative Cross-comparisonmentioning

confidence: 97%

Computations of the BeVERLI Hill Three-dimensional Separating Flow Model Validation Cases

Gargiulo

Ozoroski

Hallock

et al. 2022

AIAA SCITECH 2022 Forum

Self Cite

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Structural aspects of the attached turbulent boundary layer flow over a hill

et al. 2023

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Three-dimensional turbulent boundary layers under strong pressure gradients and curvature are the rule in real-world flow applications but are typically not well predicted by turbulence models due to isotropic eddy viscosity or equilibrium assumptions. Validation-quality data in complex 3D flows is necessary for continued efforts to improve simulation accuracy. The BeVERLI (Benchmark Validation Experiments for RANS/LES Investigations) Hill bump model, designed specifically for validation experiments, was tested in the Virginia Tech Stability Wind Tunnel to collect validation experiment data on the three-dimensional (3D) boundary layer flow over a 3D hill. Laser Doppler velocimetry measurements on the bump model were used to study the mean flow and turbulence structure and evaluate the impact of pressure gradient and curvature upon the total shear stress in the boundary layer and evaluate the impact of pressure gradient and curvature upon the total shear stress behavior in the near-wall region. From analysis of the BeVERLI Hill flow, including the boundary layer just upstream of the hill, and comparison with the 3D flow around a wing-body junction of Ölçmen et al (2001), it is shown that none of the stations studied exhibit a constant shear stress region over any significant region of the boundary layer. One station on the hill, located in a region Structural Aspects of the Attached Turbulent Boundary Layer Flow Over a Hill with strong spanwise and streamwise pressure gradients, experiences an apparent return to an equilibrium shear stress for x + 2 < 30 due to significantly increased production of u ′ 1 u ′ 2 and u ′2 2 at this station.

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