| Title |
Thermo-Flow Analysis of Offset-Strip Fins according to Prandtl Number |
| Authors |
주윤식(Youn-Sik Joo) ; 공동현(Dong-Hyun Kong) ; 이관수(Kwan-Soo Lee) |
| Keywords |
옵셋 스트립 핀 ; 상관식 ; j 인자 ; f 인자 Offset-strip fins ; Correlation ; j factor ; f factor |
| 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-ω 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. |