RESEARCH ON HYDRODYNAMICS AND HEAT-TRANSFER FOR FLUID-FLOW AROUND HEATING SPHERES IN TANDEM

The temperature field and heat transfer for fluid flow around the heating solid spheres in tandem have been measured by laser holographic interferometry together with an infrared scanning technique. The heat transfer characteristics for heating solid spheres with equal or unequal diameters as affected by various parameters such as Re, DELTA-T, x and d2/d1 are obtained experimentally in detail. The numerical simulation has been made to predict conditions of constant and variable physical properties. The numerical results are quite close to the experimental ones, and show that more systematic and audio-visual results can be obtained.