Measurement of Reverse Flow Generated at Cold Exit of Vortex Tube

In order to clarify the structure of the cold flow discharged from the vortex tube (VT), the pressure of the cold flow was measured, and a simple flow visualization technique using a 0.75mm-diameter needle and an oily paint is made to study the reverse flow at the cold exit. It is clear that a negative pressure and positive pressure region exist at a certain pressure and cold fraction area, and that a reverse flow is observed in the negative pressure region.

• Mohd Hazwan bin Yusof
• Hiroshi Katanoda

• Flow visualization
• Pressure measurement
• Reverse flow
• Vortex tube.

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