Numerical simulation and experimental study on a microscale vortex tube

Subject Areas : Fluid Mechanic

نادر رهبر ¹ , Mostafa Shateri ² , Mohsan Taherian ³ , محمد صادق ولی پور ⁴

1 - عضو هیات علمی/ دانشگاه آزاد سمنان
2 - دانشجو
3 - دانشجو
4 - عضو هیات علمی دانشگاه سمنان

Received: 2015-07-02 Accepted : 2015-07-19 Published : 2013-02-19

Keywords: Numerical simulation, Microscale vortex tube, Energy Separation, SST-Kw,

Abstract :

In This paper the energy separation phenomenon in a micro-scale vortex tube was investigated by using the computational fluid dynamic. The flow is assumed as steady, turbulent, compressible ideal gas, and the shear-stress transport is used for modeling of turbulence phenomenon. The results show that 3-D CFD simulation is more accurate than 2-D axisymmetric one. Moreover, optimum cold-mass ratios to maximize the refrigeration-power and isentropic-efficiency are evaluated. The results of static temperature, velocity magnitude and pressure distributions show that the temperature-separation in the micro-scale vortex tube is a function of kinetic-energy variation and air-expansion in the radial direction.