TITLE:
Numerical Study of Turbulent Periodic Flow and Heat Transfer in a Square Channel with Different Ribs
AUTHORS:
Ahmed M. Bagabir, Jabril A. Khamaj, Ahmed S. Hassan
KEYWORDS:
Ribs; Square Channel; Heat Transfer; Numerical Simulation; Turbulent Flow; Periodic Flow
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.1 No.6,
December
3,
2013
ABSTRACT: A numerical
investigation has been carried out to examine turbulent flow and heat transfer
characteristics in a three-dimensional ribbed square channels. Fluent 6.3 CFD code
has been used. The governing equations are discretized by the second order
upwind differencing scheme, decoupling with the SIMPLE (semi-implicit method
for pressure linked equations) algorithm and are solved using a finite volume
approach. The fluid flow and heat transfer characteristics are presented for
the Reynolds numbers based on the channel hydraulic diameter ranging from 104 to 4 ′ 104.
The effects of rib shape and orientation on heat transfer and pressure drop in
the channel are investigated for six different rib configurations. Rib arrays
of 45° inclined and 45° V-shaped are mounted in inline and
staggered arrangements on the lower and upper walls of the channel. In
addition, the performance of these ribs is also compared with the 90° transverse
ribs.