experimental study of laminar heat transfer enhancement in a circular tube fitted with koflo blade™ static mixer

This paper addresses an experimental investigation on heat transfer enhancement of laminar flow in a tube equipped with koflo blade™ inline mixer for reynolds number from 500 to 2000 and under constant surface heat flux experiments were conducted with air as working fluid and two different types of the vortex generator with angles of 90° and 120° were used the results show that heat transfer increases compared with twisted tapes and internally-finned tube both mixers showed considerable heat transfer enhancement for 1 < gz < 100 by a factor of 2 to 10 correlations obtained for nusselt number supports the experimental data for both mixers by a deviation within ±10 percent