Turbulent boundary layer: Semiempirical theory
Abstract
A unified theory for the turbulent wall boundary layer and the turbulent jet is developed on the basis of Prandtl's (1925) turbulence theory. Turbulent flows in free jets and in wall boundary layers are of the same physical nature and, therefore, may be expressed by the same laws. A boundary layer model in which a boundary of the pulsations is introduced is proposed, along with a hypothesis concerning the relationship between temperature pulsations and transverse velocity pulsations. The hypothesis is verified by comparing numerous experimental and theoretical heat transfer data. It is shown that, using this hypothesis, heat transfer can be calculated for a wide range of Prandtl numbers. The advantages of the boundary layer model and of the method proposed are particularly apparent in the calculation of semiimmersed jets, equilization of flows in mixing chambers, and of temperature fields in jets.
 Publication:

Moscow Izdatel Energiia
 Pub Date:
 1974
 Bibcode:
 1974MoIzE.........S
 Keywords:

 Boundary Layer Equations;
 Flow Theory;
 Jet Mixing Flow;
 Semiempirical Equations;
 Turbulent Boundary Layer;
 Turbulent Jets;
 Heat Transfer;
 Prandtl Number;
 Temperature Distribution;
 Velocity Distribution;
 Wall Flow;
 Fluid Mechanics and Heat Transfer