Analysis on Heat Transfer Enhancement by Using Triangular Shaped Inserts as Secondary Fins in Cross Flow Plate Fin Heat Exchanger

The geometry of the present analysis is a single element of a cross flow platefin heat exchanger in which the triangular shaped inserts are used as secondary fins. These secondary fins increase the ratio of heat transfer area to overall volume. The complete Navier-Stokes equations together with the governing equation of energy have been solved for the laminar flow at Reynolds number 100 and 200 by using the MAC algorithm. Isothermal boundary conditions are applied on all the no slip surfaces. Air is considered as the working fluid. It has been found that bulk temperature increases by 35.46% while using the inserts in plane rectangular channel at Reynolds number 100.