Experimental, computational and optimization studies of temperature separation and flow physics of vortex tube: A review

A vortex tube is a very simplistic device capable of producing phenomenal temperature separation effect. Due to spontaneity of this effect coupled with diversified applications, vortex tube has remained a topic of various research studies among the scientific community. To begin with the research work, it is essential for a researcher to get acquainted with previous investigations carried out in the relevant domain. Hence, present review is intended to put-forward the experimental and numerical (or Computational Fluid Dynamics i.e. CFD) work carried out by various researchers. Also, review of various optimization studies using techniques such as Artificial Neural Network (ANN), Taguchi method is presented, which have not received due attention previously. The core objective is to give deliberate consideration to quality outcomes of fewer unattended research work on vortex tube.