Macroscopic forcing method: A tool for turbulence modeling and analysis of closures
Ali Mani, Danah Park
Abstract
We present a numerical procedure, which we call the macroscopic forcing method (MFM), which reveals the differential operators acting upon the mean fields of quantities transported by underlying fluctuating flows. More broadly, MFM can reveal differential operators associated with turbulence closure for scalar and momentum transport. We present MFM using canonical problems with increasing complexity, from a simple parallel flow to a complex nonhomogeneous flow, and show its efficacy, which can be utilized for quantitative understanding of non-Boussinesq effects and assessment of model forms in turbulence closures.
Topics & Concepts
Forcing (mathematics)TurbulenceTurbulence modelingStatistical physicsMechanicsPhysicsAtmospheric sciencesFluid Dynamics and Turbulent FlowsComputational Fluid Dynamics and AerodynamicsWind and Air Flow Studies