NUMERICAL SIMULATION OF FLOW AND FORCED CONVECTION HEAT TRANSFER IN CROSSFLOW OF INCOMPRESSIBLE FLUID OVER TWO ROTATING CIRCULAR CYLINDERS
Keywords:
Heat transfer, flow over two rotating cylinders, incompressible fluid, finite difference methodAbstract
In this paper, the problem of laminar two dimensional heat transfer from two rotating circularcylinders in cross flow of incompressible fluid under isothermal boundary condition is investigated.The study is based on the numerical solution of the full conservation equations of mass, momentumand energy for Reynolds numbers (based on cylinder diameter and velocity of uniform stream) up to40 while Prandtl number ranges between 0.7 and 50. For the range of parameters considered, thestudy revealed that the rate of heat transfer decreases with the increase of speed of cylinders rotationfor the gap between cylinders more than one diameter. The increase of Prandtl number resulted inan appreciable increase in the average Nusselt number. The streamlines and isotherms are plottedfor a number of cases to show the details of the velocity and thermal fields.
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