Abstract
The present state of the question of relaxation (memory) phenomena in turbulent wall and free boundary layers is reviewed. A simple derivation of the basic differential equation of the relaxation is proposed, and the region of applicability of this equation is extended to motion in the preseparation region of a boundary layer. The importance of taking into account the influence of relaxation processes is illustrated by a comparison with the available experimental data of calculations of the tangential Reynolds stresses in accordance with the relaxation theory and the local theory based on the Boussinesq hypothesis.
Keywords
Experimental Data Differential Equation Boundary Layer Fluid Dynamics Present State
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© Plenum Publishing Corporation 1982