Shahrood University of Technology Journal of Solid and Fluid Mechanics 2251-9475 4 3 2014 09 23 Numerical simulation of laminar flow and heat transfer from rotating circular cylinder confined in a channel Numerical simulation of laminar flow and heat transfer from rotating circular cylinder confined in a channel 65 81 341 10.22044/jsfm.2014.341 FA Reza Jafari isfahan university of technology Mohsen Saghafian Isfahan university of technology Journal Article 2013 08 25 In the present study, fluid flow around and heat transfer from a rotating circular cylinder confined in a channel are studied numerically using overset grid method.The governing equations consist of continuity, momentum and energy equations are solved for laminar flow . Numerical simulations are performed for Reynolds numbers varying from 100 to 500, non dimensional rotational velocities of 0, 1 and 2, blockage ratios of 0.1, 0.3 and 0.5 and prandtl numbers of 0.7 and 7. The results show that the transition from steady flow to unsteady flow is delayed as blockage ratio increases. Drag coefficient and heat transfer are reduced by rotation of the cylinder, In contrast as blockage ratio increases, Drag coefficient and heat transfer increases. In unsteady flow past a circular cylinder confined in a channel, the pattern of shed vortices is different from that observed in free stream flow past a circular cylinder and the vortices behind the cylinder moves criss-cross. In the present study, fluid flow around and heat transfer from a rotating circular cylinder confined in a channel are studied numerically using overset grid method.The governing equations consist of continuity, momentum and energy equations are solved for laminar flow . Numerical simulations are performed for Reynolds numbers varying from 100 to 500, non dimensional rotational velocities of 0, 1 and 2, blockage ratios of 0.1, 0.3 and 0.5 and prandtl numbers of 0.7 and 7. The results show that the transition from steady flow to unsteady flow is delayed as blockage ratio increases. Drag coefficient and heat transfer are reduced by rotation of the cylinder, In contrast as blockage ratio increases, Drag coefficient and heat transfer increases. In unsteady flow past a circular cylinder confined in a channel, the pattern of shed vortices is different from that observed in free stream flow past a circular cylinder and the vortices behind the cylinder moves criss-cross. https://jsfm.shahroodut.ac.ir/article_341_d3f4955efabbd1752a52a08e9e6f87c2.pdf