NUMERICAL SIMULATION OF THE INTENSIFICATION OF THE HEAT EXCHANGE IN A PLANE-PARALLEL CHANNEL WITH A CYLINDRICAL SHALLOW DIMPLE ON THE HEATED WALL

A comparison of the results of numerical calculations of the convective heat exchange in narrow plane-parallel channels with shallow cylindrical and spherical dimples on their wall heated by a constant heat fl ow under the conditions of low-velocity turbulent water fl ow in a channel at Re = 20,000 has been performed. Hydrodynamic features of the vortex intensifi cation of the heat exchange in the indicated channels as a result of the interaction of the swirling fl ows in them with the side walls of a dimple were determined. The thermal and thermohydraulic effi ciencies of a shallow cylindrical dimple were estimated. It is shown that this dimple offers substantial advantages over a spherical dimple of the same depth.
A comparison of the results of numerical calculations of the convective heat exchange in narrow plane-parallel channels with shallow cylindrical and spherical dimples on their wall heated by a constant heat fl ow under the conditions of low-velocity turbulent water fl ow in a channel at Re = 20,000 has been performed. Hydrodynamic features of the vortex intensifi cation of the heat exchange in the indicated channels as a result of the interaction of the swirling fl ows in them with the side walls of a dimple were determined. The thermal and thermohydraulic effi ciencies of a shallow cylindrical dimple were estimated. It is shown that this dimple offers substantial advantages over a spherical dimple of the same depth.
Author:  S. A. Isaev A. I. Leontiev P. A. Baranov,c UDC 532.517:4 I. A. Popov A. V. Shchelchkov and I. P. Gabdrakhmanov
Keywords:  intensifi cation of heat exchange, cylindrical and spherical dimples, narrow plane-parallel channel, multiblock computational technologies, intersecting structured meshes
Page:  1186