Numerical Simulation of a Periodic Quasi-Switching Mode of Flow around a Conical Dimple with a Slope Angle of 10 Degrees on the Wall of a Narrow Channel Using URANS

The applicability of the solution unsteady Reynolds-averaged Navier–Stokes equations (URANS) for numerical simulation periodic quasi-switching regime vortex generation and heat transfer in a deep conical dimple with slope angle 10∘ on wall narrow channel is substantiated. To calculate turbulent regime, model shear stress by Menter 2003, modified taking into account influence curvature streamlines within framework Rodi-Leshziner-Isaev approach, used. At Reynolds number Re=104, oscillation period transverse Rz longitudinal forces Rx, as well total Numm to control section heated dimple, set equal 60, which corresponds Strouhal St=0.0167. Computer visualization swirling jet-vortex flows demonstrates focus-type sources side faces dimple. In self-oscillating mode, two-cell system formed different intensities at Rz. Periodic changes friction, Nusselt numbers temperature are recorded median sections reflect oscillations structure from left right left. formation fan jet shown, oscillates relative plane symmetry, causing redistribution power thermal loads.