A Family of Turbulence Models for Three-Dimensional Boundary Layers

摘要: The process of turbulent shear-stress generation is studied on the basis transport equations, as derived from Navier-Stokes equations. experimental observation that vector shear stress in general not parallel to mean velocity gradient, attributed mainly fluctuating pressure term. A new simple approximation part pressure-strain term depends rate strain proposed. It used a closure assumption for family turbulence models most complicated which consists equations stresses and energy equation. Dropping terms, three-dimensional versions eddy viscosity relationships mixing. length formulas are obtained, nonisotropic. relations describe typical features boundary layers like decrease both ratio conventional mixing with angle between vectors gradient velocity.