CFD Based Comparative Analysis of Different Ribs with Varying and Same Height in Rectangular Duct

Author(s):

Sandeep Kumar Karole , SCOPE COLLAGE OF ENGINEERING BHOPAL(M.P.); Mr. Ishwar Singh, SCOPE COLLAGE OF ENGINEERING BHOPAL(M.P.)

Keywords:

Computational analysis, Friction factor, Heat Transfer, Pressure Drop, ribbed channel

Abstract:

A computational study are conducted to assess turbulent forced convection heat transfer and friction loss behaviors for air flow through a constant heat flux channel fitted with House shaped ribs at same height and uniformly varying height shaped ribs. Ten rib arrangements, namely, in-line and staggered arrays, are introduced. Measurements are carried out for a rectangular channel of aspect ratio, AR=1 and height, H=1.598 mm with single rib height, e=1.598 mm and rib pitch, P=22.91 mm, Uniformly Varying Height up to 2 mm. The flow rate is in terms of Reynolds numbers based on the inlet hydraulic diameter of the channel in a range of 4000 to 12,000. The computational results show a significant effect of the presence of the ribs on the heat transfer rate and friction loss over the smooth wall channel. The in-line rib arrangement provides higher heat transfer and friction loss than the staggered one for a similar mass flow rate. In comparison, the isosceles triangular, house-shaped , right-angle triangular, reverse pentagonal. Pointing downstream yields the highest increase in both the Nusselt number and the pressure drop but the reverse pentagonal (UVH) ribs and right angle triangular (UVH) with staggered array shows better thermal performance over the others.

Other Details:

Manuscript Id	:	IJSTEV1I10010
Published in	:	Volume : 1, Issue : 10
Publication Date	:	01/05/2015
Page(s)	:	6-15

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