Since, cooling is the main use of vortex tube, the exited heat from the hot outlet of vortex tube can be assumed as the wasted energy when it is used as a cooling device. So, this paper tries to reduce the hot and cold temperatures at exhausts in order to increase the vortex tube cooling power. In this paper, a new method is studied which uses the shell heat transfer mechanism to affect the flow pattern inside the vortex tube. This research tries to clarify the flow pattern inside the vortex tube applying a fixed negative heat flux on the wall of the vortex tube. The results indicate that a part of main tube (around 23%) can be introduced as the effective cooling length.
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