Görtler vortices and their effect on heat transfer in rotating boundary layer

This paper reports on the influence of Coriolis force on the heat transfer characteristics in rotating laminar boundary layer. The experiments have been conducted for the mean flow velocity U8=4.0m/s and the angular velocity Ω=4.6 rad/s, and the heat flux has been applied uniformly over the plate. Liquid crystal method is applied to measuring the surface temperature distribution. The results indicate that heat transfer has been enhanced on the pressure surface. The velcity measurements show that Coriolis instability induces the counter-rotating longitudinal vortices which argument the heat transfer from the pressure surface. On the other hand, the heat transfer from the suction surface remains unchanged as compared to the no-rotating case, which is due to the Coriolis force that stabilizes the boundary layer. As a consequence, the averaged heat transfer coefficient is higher on the pressure surface than that on the suction surface and the stationary wall by approximately 40%.