ABSTRACT
Fluid flow and forced convection heat transfer across a stationary/rotating circular cylinder (maintained at a constant wall temperature) in an adiabatic plane channel is studied numerically for blockage ratios (β) of 0.1, 0.2, 0.3 and 0.5. The study is done for various Reynolds number and rotational velocity. The working fluid is taken as air (Pr=0.7) which enters the channel with fully developed parabolic inlet velocity profile.
The flow-transition for channel confined flow across stationary/rotating cylinder from steady flow to a periodic vortex shedding regime at different blockage ratio is investigated. Furthermore, at vortex-shedding Reynolds number=100, the suppression of vortex shedding at certain critical rotational velocity is studied for the various blockage ratios. It is found that channel-confinement as well as cylinder rotation has stabilizing effect on the flow past a cylinder.
The effect of rotation is to increase the lift coefficient and decrease the drag coefficient. Whereas, the channel confinement increases both lift and drag coefficient. Very small change in the Nusselt number is found under the influence of rotation and channel-confinement.
