AN EXPERIMENTAL STUDY OF FORCED COOLING ACROSS HEATED RECTANGULAR BLOCKS
THAN, HUNG TRONG HOANG
Master of Science
Two dimensional laminar and turbulent forced convective flows over heated rectangular obstructions on insulated plates were experimentally investigated. Velocities were measured by a three beam Laser Doppler Velocimetry system operating in the backward scattering mode with a counter type signal processor, and temperatures were measured with copper-constantan thermocouples. Assumptions such as insulated plates, constant heat production by the obstructions and uniform velocity profile at the entrance were made to render the problem controllable in the laboratory environment. Only laminar velocity and temperature profiles were compared with existing numerical values. Recirculating flow between adjacent blocks was detected. Heat removal enhancement along the bottom plate due to high local turbulence was observed. Velocity profiles and local Nusselt numbers for three Reynolds numbers are presented to assist in the design of electronic packaging.