Abstract
This paper is concerned with the new type of the cooling unit to which the flow mechanism of fluidics called "the vortex chamber oscillation device" is applied. The water jet issuing from this cooling device impinges on the heated plate with swinging by itself. Since the flow mechanism of swinging water jet and the impinging property have been reported already in previous paper, the cooling process by this cooling device have been visualized through the infrared camera in this paper. Furthermore, by comparing the cooling area by the swinging water jet with that by non-swinging one, the validity of this proposed cooling unit have been confirmed.