The work has been done on a 3D model of vortex tube and
the governing equations have been solved using ANSYS–
FLUENTTM software. Simulations were performed using density
based solver and k-ε turbulence model. After validating some
results of present study with available data, the effects of
geometrical parameters and air/natural gas flow in a vortex tube
with 6 and 2 tangential nozzles was examined. The performance
of vortex tube with 6 nozzles was better when compared with 2
nozzles which is in satisfactory agreement with previous
experiments, so we only show the results for the 6 nozzles vortex
tube. There is a little difference between air and natural gas as a
working fluid. We found that the temperature difference between
hot and cold ends for air flow was little more than natural gas.
Based on the results obtained in this work it is concluded that
vortex process based on pressurized natural gas can be used in
C.G.S as a heat exchanger for high efficiency operation and
energy saving purposes.
Papers presented to the 12th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Costa de Sol, Spain on 11-13 July 2016.