Heat/mass transfer and pressure drop in a triangular-rib-roughened rectangular channel

In this paper, the heat/mass transfer analogy was used to investigate the heat transfer and pressure drop in a square channel with triangular ribs on its two opposite walls. Reynolds number varied from 1 × 10 4 to 7 × 10 4; the dimensionless heights of the triangular ribs H/W were 0.04, 0.07, and 0....

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Bibliographic Details
Published in:The International journal of heat and fluid flow 1994-12, Vol.15 (6), p.486-490
Main Authors: Ling, Chang-Ming, Jin, Yuan-Yue, Chen, Zhong-Qi
Format: Article
Language:English
Subjects:
Applied sciences
Crude oil, natural gas and petroleum products
Energy
Exact sciences and technology
Fuels
heat transfer
pressure drop
Prospecting and production of crude oil, natural gas, oil shales and tar sands
roughened surface
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Summary:In this paper, the heat/mass transfer analogy was used to investigate the heat transfer and pressure drop in a square channel with triangular ribs on its two opposite walls. Reynolds number varied from 1 × 10 4 to 7 × 10 4; the dimensionless heights of the triangular ribs H/W were 0.04, 0.07, and 0.1; and their dimensionless pitches S/W were 0.45, 0.63, 1.0, 1.37, 1.55, and 2.1. Experimental results showed that the heat transfer coefficients of the wall with triangular rib were about 1 to 2.3 times larger than those of a smooth-channel wall, and the pressure drops along this roughened channel were about 1 to 10 times larger than those for a smooth channel. Correlations of heat transfer and pressure drop were obtained, which are useful for practical designs.
ISSN:0142-727X
1879-2278
DOI:10.1016/0142-727X(94)90008-6