Contributed Papers

Acta Mechanica

, Volume 59, Issue 3, pp 251-268

First online:

Unsteady incompressible two-dimensional and axisymmetric turbulent boundary layer flows

  • M. KumariAffiliated withDepartment of Applied Mathematics, Indian Institute of Science

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The unsteady turbulent incompressible boundary-layer flow over two-dimensional and axisymmetric bodies with pressure gradient has been studied. An eddy-viscosity model has been used to model the Reynolds shear stress. The unsteadiness is due to variations in the free stream velocity with time. The nonlinear partial differential equation with three independent variables governing the flow has been solved using Keller's Box method. The results indicate that the free stram velocity distribution exerts strong influence on the boundary-layer characteristics. The point of zero skin friction is found to move upstream as time increases.