NONISOTHERMAL FLOW AROUND A CIRCULAR CYLINDER WITH A PERMEABLE LAYER AT MODERATE REYNOLDS NUMBERS

Results of a numerical investigation of a separation nonisothermal fl ow of an incompressible viscous fl uid around a circular cylinder covered with a permeable porous layer at moderate Reynolds numbers are presented. This flow was defi ned with the use of Navier–Stokes and energy equations, and the fi ltration fl ow in the porous layer was determined by the Forchheimer law. The dependence of the hydrodynamical drag of the indicated cylinder and the
length of the vortex region in the fl ow around it on the Reynolds and Darcy numbers was determined. An analysis of the heat transfer from cylindrical bodies covered with permeable layers of a highly heat-conducting material or a heat-insulating material has been performed.
Results of a numerical investigation of a separation nonisothermal fl ow of an incompressible viscous fl uid around a circular cylinder covered with a permeable porous layer at moderate Reynolds numbers are presented. This flow was defi ned with the use of Navier–Stokes and energy equations, and the fi ltration fl ow in the porous layer was determined by the Forchheimer law. The dependence of the hydrodynamical drag of the indicated cylinder and the
length of the vortex region in the fl ow around it on the Reynolds and Darcy numbers was determined. An analysis of the heat transfer from cylindrical bodies covered with permeable layers of a highly heat-conducting material or a heat-insulating material has been performed.
Author:  I. V. Morenko and B. A. Snigerev
Keywords:  permeable porous layer, circular cylinder, heat exchange, nonisothermal flow
Page:  896