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http://dx.doi.org/10.5916/jkosme.2013.37.1.40

Numerical analysis on heat transfer and pressure drop characteristics in a horizontal channel with various ribs  

Kim, Ji-Hoon (동의대학교 대학원)
Heo, Joo-Nyoung (동의대학교 대학원)
Ahn, Sung-Hoo (동의대학교 대학원)
Lee, Doo-Ho (동의대학교 기계공학과)
Son, Young-Seok (동의대학교 기계공학과)
Shin, Jee-Young (동의대학교 기계공학과)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.37, no.1, 2013 , pp. 40-46 More about this Journal
Abstract
Turbulent flow and heat transfer in a channel with a detached rib array have been simulated. The computations are based on the finite volume method with the SIMPLE algorithm. The forms of ribs considered in this study were rib with rectangular cross section, rib with groove, broken rib, and V-shaped rib. The ribs were deployed transverse or aligned $60^{\circ}$ to the main direction of the flow. Local heat transfer coefficients were obtained at various Reynolds numbers within the turbulent flow regime. Area-averaged data were calculated in order to compare the overall performance of the tested ribbed surfaces and to evaluate the degree of heat transfer enhancement induced by the ribs with respect to the smooth channel. The highest heat transfer occurred for the rib with groove which was aligned $60^{\circ}$ to the main flow direction. Performance factor was decreased with the increase of velocity, and it was found that the best performance factor was obtained in the low velocity region.
Keywords
Rib; Heat transfer characteristics; Friction factor; Performance factor; Pumping power;
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