On turbulent boundary layer structure (Q1120408)

Flow in the turbulent boundary layer (BL) with Reynolds number \(R\to \infty\) is studied by a joining asymptotic expansion method. A three- layered asymptotic BL structure is set up, which includes, besides the viscous boundary region and the velocity defect region, an intermediate region in which a balance of inertia forces, and pressure and turbulent friction forces takes place and which is responsible for flow separation under the influence of a disadvantageous pressure gradient.