Abstract
The natural cooling capability and flow field in relatively small electronic equipment were studied. A vertical channel model was used as an experimental model of electronic equipment. The channel model has two vertical copper walls modeling the printed circuit boards and two transparent walls modeling the casing walls. The clearance between the copper walls is varied from 5 mm to 15 mm. The natural cooling capability was obtained as functions of the wall clearance. The velocity profiles in the channel were quantitatively measured using a particle image velocimetry (PIV). When the channel clearance was 5 mm, the cooling capability of the natural convection was dropped and the velocity in the channel model was reduced.
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