On the Use of Kinetic-Energy Balance for the Feature-Based Mesh Adaptation Applied to Large-Eddy Simulation in Complex Geometries

Abstract

Static and dynamic feature-based mesh adaptation have gained momentum during the last decade as they allow to refine areas to capture specific flow features. These methods do not always guaranty that the budget of the kinetic energy of the mean field is mesh independent as it could be expected. In the present paper, a framework which uses the assessment of the kinetic energy budget to refine or coarsen the mesh resolution locally is presented in the framework of Large-Eddy Simulation (LES). The whole methodology is applied to two industrial configurations, namely the isothermal PRECCINSTA burner and a row of three jets impinging on a surface at Re = 23000 and a nozzle to plate distance of H/D = 5. Flow field quantities, including mean velocity and RMS or Nusselt number on the final grids are in good agreement with experimental data.