Ordinary-differential-equation-based nonequilibrium wall modeling for large-eddy simulation
Ryo Kamogawa, Yoshiharu Tamaki, Soshi Kawai
Abstract
The wall modeling that accounts for the nonequilibrium effects of boundary layers, such as the pressure-gradient and convective terms, is desirable for predicting separated and reattached flows at high Reynolds numbers. However, typical nonequilibrium wall models solve partial differential equations on wall-layer meshes, which can complicate utilization of the model for complex geometries. In this study, we propose a nonequilibrium wall model that solves ordinary differential equations in the wall-normal direction, eliminating the need for wall-layer meshes.
Topics & Concepts
Non-equilibrium thermodynamicsOrdinary differential equationPartial differential equationMechanicsBoundary layerReynolds numberDifferential equationPhysicsPolygon meshBoundary value problemLarge eddy simulationClassical mechanicsMathematicsGeometryMathematical analysisThermodynamicsTurbulenceFluid Dynamics and Turbulent FlowsComputational Fluid Dynamics and AerodynamicsModel Reduction and Neural Networks