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Fluid Dynamics

, Volume 52, Issue 2, pp 275–287 | Cite as

Application of the method of near-wall boundary conditions to an investigation of turbulent flows with longitudinal pressure gradients

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Abstract

The dynamic and thermal characteristics of steady near-wall boundary layers in flow deceleration regions are studied on the basis of differential turbulencemodels. The method of transferring the boundary conditions from the wall into the flow is tested for flows with variable longitudinal pressure gradients. Using differential turbulence models in the transition and low-Reynolds-number regions near surfaces the effect of the parameters of highly turbulent free stream on the development of dynamic processes in the developed turbulent boundary layer in the flow deceleration region is studied. The calculated profiles of the velocity, the kinetic energy of turbulence, the friction and thermal conductivity coefficients, and the temperature factor are compared with the experimental data in the cases in which the boundary conditions are preassigned both on the wall and in the flow. The effect of an intermediate boundary condition on the results of the calculations is analyzed.

Keywords

turbulent flows laminar-turbulent transition turbulence models boundary layer near-wall conditions numerical methods heat transfer deceleration region 

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© Pleiades Publishing, Ltd. 2017

Authors and Affiliations

  1. 1.Ishlinsky Institute for Problems in Mechanics of the Russian Academy of SciencesMoscowRussia

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