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Thermo-Flow Analysis of Offset-Strip Fins according to Prandtl Number  

Joo, Youn-Sik (School of Mechanical Engineering, Hanyang University)
Kong, Dong-Hyun (School of Mechanical Engineering, Hanyang University)
Lee, Kwan-Soo (School of Mechanical Engineering, Hanyang University)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.21, no.6, 2009 , pp. 340-346 More about this Journal
Abstract
This paper numerically investigates thermo-flow characteristics of offset strip fins to obtain a correlation between heat transfer and pressure drop. The flow was divided into three regimes, i.e. laminar, transition and turbulent. The predicted j and f values from the SST k-$\omega$ turbulence model agreed with previous correlations with the error less than 20% in transition and turbulent regimes. Heat transfer and pressure drop were predicted by varying Prandtl number from 0.5 to 40. The Prandtl number showed little effects on pressure drop but had great effect on the heat transfer characteristics. An overall correlation to predict j was suggested by incorporating the effect of Pr and a new j correlation was suggested for each Pr.
Keywords
Offset-strip fins; Correlation; j factor; f factor;
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