A wall model learned from the periodic hill data and the law of the wall
Zhideng Zhou, Xiang I. A. Yang, Fengshun Zhang, Xiaolei Yang
Abstract
Toward data-driven wall-modeled large-eddy simulations of different wall-bounded turbulent flows, a wall model is learned in this work using the wall-resolved large-eddy simulation (WRLES) data of the flow over periodic hills (PH) and the law of the wall (LoW). The feedforward neural network (FNN) is employed to construct the model. The obtained FNN_PH-LoW model is successfully tested using the direct numerical simulation data of turbulent channel flows and the WRLES data of PH cases, and applied to turbulent channel flows for a wide range of Reynolds numbers.
Topics & Concepts
TurbulencePhysicsMechanicsReynolds numberLaw of the wallLarge eddy simulationDirect numerical simulationWork (physics)Open-channel flowFlow (mathematics)Statistical physicsThermodynamicsFluid Dynamics and Turbulent FlowsHeat Transfer MechanismsModel Reduction and Neural Networks