Wall-Resolved Large-Eddy Simulation of Flow Over a Three-Dimensional Gaussian Bump

AbstractWall-resolved large-eddy simulations were carried out for the flow over a Gaussian bump configuration. The geometry and flow conditions were motivated by an experimental investigation, which was conducted in order to provide data for validating numerical modelling. The present computations were initiated as benchmark results that are accessible via wall-resolved large-eddy simulation. It was found that by increasing the bump height, the Reynolds number could be reduced and flow separation would occur. The modified bump then serves as a surrogate for the original Gaussian bump producing a smooth separated flow. Solutions to the unsteady three-dimensional compressible Navier-Stokes equations were obtained utilising a high-fidelity computational scheme and an implicit time-marching approach. Large-eddy simulations were performed and grid resolution studies were carried to ensure quality of computed results. Features of the flowfields are elucidated, and it was found that the time-mean surface streamline pattern had similar features to that of the experiment.Keywords: Smooth-Body separationGaussian bumplarge-eddy simulationhigh-order numerical methodcompact-differencing scheme Disclosure statementNo potential conflict of interest was reported by the author(s).Additional informationFundingThis material is based upon work supported by the Air Force Office of Scientific Research under an award monitored by G. Abate. Computational resources were supported in part by grants of supercomputer time from the U. S. Department of Defense Supercomputing Resource Centers at the Stennis Space Center, MS, Vicksburg, MS, and Wright-Patterson AFB, OH.