Thermal performance analysis and empirical correlations for laminar forced convection over 30° V-Baffled square channel

Boonloi, Amnart; Jedsadaratanachai, Withada

doi:10.1155/2014/930272

Thermal performance analysis and empirical correlations for laminar forced convection over 30° V-Baffled square channel

Author(s)

Boonloi, Amnart

Jedsadaratanachai, Withada

Date Issued

January 1, 2014

Type

Article

DOI

10.1155/2014/930272

Abstract

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.

Citation

Advances in Mechanical Engineering, 2014, 2014