scholarly journals Numerical Study of Turbulent Periodic Flow and Heat Transfer in a Square Channel with Different Ribs

2013 ◽  
Vol 01 (06) ◽  
pp. 65-73 ◽  
Author(s):  
Ahmed M. Bagabir ◽  
Jabril A. Khamaj ◽  
Ahmed S. Hassan
2010 ◽  
Vol 30 (11-12) ◽  
pp. 1292-1303 ◽  
Author(s):  
Pongjet Promvonge ◽  
Withada Jedsadaratanachai ◽  
Sutapat Kwankaomeng

2014 ◽  
Vol 6 ◽  
pp. 930272 ◽  
Author(s):  
Amnart Boonloi ◽  
Withada Jedsadaratanachai

Thermal performance analysis for laminar forced convection in an isothermal wall square channel with 30° V-baffle is presented numerically. The parameters of the V-baffle, blockage ratio (b/H, BR), pitch ratio (P/H, PR), flow direction (V-Downstream and V-Upstream), and arrangement (in-line and staggered), are studied and compared with the previous works, 20° and 45° V-baffle. The Reynolds number based on the hydraulic diameter of the channel ( D h), Re = 100–2000, is used in range study. The results show that the flow configurations of 30° V-baffle are found similar as 20° and 45° V-baffle. The fully developed periodic flow and heat transfer are created around 7th-8th module, while the periodic flow and heat transfer profiles are found at 2nd module in all cases. Except for the periodic concept, the 30° V-baffle can help to reduce the pressure loss around 2.3 times in comparison with the 45° V-baffle at the maximum f/ f0 value (BR = 0.3, PR = 1, V-Downstream). The optimum thermal enhancement factor for the 30° V-baffle is found around 4.25 at BR = 0.15, PR = 1, and Re = 2000 for V-Downstream case with in-line arrangement.


2015 ◽  
Vol 9 (3) ◽  
pp. 242 ◽  
Author(s):  
Efstathios Kaloudis ◽  
Dimitris Siachos ◽  
Konstantinos Stefanos Nikas

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