Development of Eagle3D solver for wall modeled LES of transonic flows
Abstract
Wall modeled Large Eddy Simulation (LES) is an area of interest due to its ability to lower computational costs of LES simulation. Even with the application of wall models, LES still proves to have practicality issues when it comes to use in industry, due to the expertise, time, and computational resources required to get results. A case described by an axisymmetric transonic bump is explored utilizing the Embry-Riddle Aeronautical Universities in house unstructured finite volume multi-element CFD code, Eagle3D. Eagle3D, has been brought to the state of the art and validated against current research using this transonic bump case as a benchmark. Added to Eagle3D includes features such as an HLLC and skew symmetric scheme switched via Ducros sensor, integrated Synthetic Eddy Method (SEM) such that realistic turbulence can be produced at domain inlets, and the implementation of a wall model. Additionally, a novel technique for generating a lean LES grid is explored. The technique utilizes a RANS solution to extract turbulence information and infer a lean grid optimized for wall modeled LES. The solution found by the generated grid is then compared against the validation cases ran in Eagle3D.
