Studying the effect of a triangle protrusions dimensions on heat transfer and fluid flow over a heated fin inside rectangular duct

Abstract EN

A numerical study was carried out to investigate fluid flow and heat transfer over a heated fin (at constant heat flux ) with using a triangle protrusions with Reynolds number range (350 – 2000) and Pr = 0.71.

Different distance between the protrusions (b / H = 0, 0.17, 0.33, 0.67, 1 ) with different height of protrusion (l / H = 0.033, 0.067, 0.1 ) was used were (H) is the height of duct.

The geometrical configuration of interest is similar to a single element of a platefin cross flow heat exchanger.

The installation of protrusion is organized, in such way that increased the surface of fin and mixed the flow near the fin with main flow.

A finite volume procedure was used to solve two dimensions conservation equations (mass, momentum and energy) with collocated grid.

The results illustrate the essential significance of protrusion height and the distance between the protrusions base.

Also, results show the heat transfer increasing with using protrusions as well as increasing pressure drop.