Decomposition of the mean friction drag in adverse-pressure-gradient turbulent boundary layers
Yitong Fan, Weipeng Li, Marco Atzori, Ramón Pozuelo, Philipp Schlatter, Ricardo Vinuesa
Abstract
From an energy budget perspective, the decomposition of mean friction drag in adverse-pressure-gradient turbulent boundary layers is conducted, obtaining contributions associated with dissipation, production, and convection across the boundary layer. In the wall-normal distributions of the decomposed constituents, positions of inner peaks are well scaled in viscous units, whereas outer peaks scale in outer units, regardless of Reynolds number and pressure-gradient magnitude.
Topics & Concepts
Adverse pressure gradientPressure gradientBoundary layerDragTurbulenceMechanicsReynolds numberParasitic dragBoundary (topology)Flow separationBoundary layer thicknessDissipationMaterials scienceConvectionPhysicsThermodynamicsMathematicsMathematical analysisFluid Dynamics and Turbulent FlowsHeat Transfer MechanismsParticle Dynamics in Fluid Flows