Heat Transfer Enhancement Through Swirl Flow Devices

This survey suggests a broad review of the various heat transfer enhancement techniques caused due to swirl flowhas various applications in the area related toengineering field such as chemical and mechanical mixing and separation devices, turbo machinery, chemical reactors, combustion chambers. To enhance the heat andmass transfer, there is a need of the better utilization of swirl flow. The swirl flow canbe generated by various techniques either by active or passive.Passive techniques, where inserts are used in the flow passage to increase the heat transfer rate, are advantageous compared with active techniques, because the insert manufacturing process is simple and these techniques can be easily employed in an existing heat exchanger. Twisted-tape is one of the most important members of enhancement techniques, which employed extensively in heat exchangers. Twisted tapes are the metallic strips twisted with some suitable techniques with desired shape and dimension, inserted in the flow. This paper demonstrates the various studies heat transfer through swirl flow devices