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Paper Information

Journal:   IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION B- ENGINEERING   OCTOBER 2010 , Volume 34 , Number B5 (MECHANICAL AND MATERIALS ENGINEERING); Page(s) 471 To 485.
 
Paper: 

HEAT TRANSFER AND FLUID FLOW THROUGH A RIBBED PASSAGE IN STAGGERED ARRANGEMENT

 
 
Author(s):  SOHANKAR A.*
 
* DEPT. OF MECHANICAL ENGINEERING, YAZD UNIVERSITY, YAZD, I. R. OF IRAN
 
Abstract: 
Fluid flow and heat transfer are computed through a rib-roughened duct of square cross-section. The staggered ribs are attached along the two opposite walls of the channel to augment heat transfer. Simulations are performed with an incompressible SIMPLEC finite volume collocated code. Five different versions of k-w and k-e turbulence models are employed. The molecular Prandtl number is 0.71 and the Reynolds number based on the bulk velocity and the height of the channel is 100000.
The predicted flow field and heat transfer show a relatively good agreement with the experimental results for different employed turbulence models, although the predicted flow field results are much better than the heat transfer results.
Employing a variable turbulent Prandtl number according to the Kays and Crawford relation shows only a small difference in the estimated turbulent heat transfer fluxes. The influence of constant turbulent Prandtl numbers ranging from 0.5 to 0.92 is also examined and it is found that it has a significant effect on the simulation results of the heat transfer.
 
Keyword(s): RIB-ROUGHENED CHANNEL, STAGGERED RIBS, HEAT TRANSFER AUGMENTATION, TURBULENT PRANDTL NUMBER
 
References: 
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