Numerical Simulation of Unsteady-State Heat Transfer under Conditions of Laminar Transverse Flow past a Circular Cylinder

Two-dimensional Navier-Stokes and energy equations are used to perform a numerical calculation of the parameters of unsteady-state flow and heat transfer under conditions of laminar transverse flow of a viscous incompressible fluid past a circular cylinder and at $\text{Re} = 140$. The process of formation of Karman vortex street is treated, as well as the cyclic heating of the near and far wakes behind the heated cylinder. Special attention is given to analysis of the behavior of the integral characteristics of flow and heat transfer, and the distributions of pressure, friction and heat-transfer coefficients on the cylinder surface, as well as to correlations of the parameters of flow and temperature at selected points in the vicinity of the cylinder. Evaluation is made of the effect of the factor of unsteadiness on the increment of power and heat loads in the process of flow past the cylinder.