AUGMENTATION HEAT TRANSFER IN A CIRCULAR TUBE USING TWISTED - TAPE INSERTS: A REVIEW

Heat transfer enhancement is the process of increasing heat-transfer coefficient, which enhances system's performance. Enhancing heat a major problem for saving energy and also beneficial economically. Many passive devices are used inside tubes to improve such as twisted tape inserts, rough parts, extended surfaces, additives liquids wire plugs, etc. This research reviewed one most effective inserts. Since it has many advantages simple fabrication, operation, ease maintenance. The inserts generated swirl flow vortex tube. Therefore, internal convective significantly improved. current article provides an overview different twisting that can rates. By reducing boundary layer thickness near tube walls. Which lead reduce size cost industrial applications, including exchangers, refrigeration systems, air conditioners, reactors, thermal power plants, spacecraft, automobiles. A summary previous experimental numerical studies presented well. primary results indicated demonstrated be efficient in enhancing laminar turbulent flow. But during flow, tapes increased pressure loss more than because obstruction.