Numerical investigation to analyse the effect of fin shape on performance of finned tube heat exchanger

Shah, Rupesh; Shah, Mihir

doi:10.15282/jmes.16.3.2022.04.0713

Cited by 2 publications

(3 citation statements)

References 21 publications

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“…The region of velocity gradient at windward surface of tube and wake region at leeward surface are more intensive in case of circular shape of annular fin. Similar kind of flow pattern is observed by Shah and Shah [23]. Analysis of flow characteristics between two fins are essential to understand the local flow behaviour over a finned tube surface.…”

Section: Flow Behavioursupporting

confidence: 70%

“…In the fourth case, sectional fin shape is replaced by sectorial one. In fifth case, heat transfer and flow characteristics are calculated for elliptical fin with 0.052 m vertical diameter (along fluid flow) and 0.034 m horizontal diameter (normal to fluid flow) [23]. Schematic views of different annular fins is shown in Figure 2.…”

Section: Modeling Of Computational Domainmentioning

confidence: 99%

“…Geometrical parameters of annular fin affect the heat transfer and flow characteristics across a tube surface. Shah and Shah [23] and Nemati et al [24] also analysed the effect of change in diameter ratio of fin on heat transfer and flow characteristics across a tube surface. It was concluded that geometrical parameters of fin affect the heat transfer and pressure drop.…”

Section: Introductionmentioning

confidence: 99%

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Relative assessment of various annular fin shapes for heat transfer and pressure penalty

Shah

2022

JMES

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Three dimensional numerical investigations are carried out to analyse the effect of different shapes of annular fin on heat transfer characteristics and pressure drop across a tube surface. Shear stress transport based k-ω turbulence model is used to analyse flow physics and heat transfer characteristics in flow domain. Weak zones of heat transfer across a circular tube surface are identified for 2500 < Re < 13000. Three different shapes of annular fin are considered to test the possibility of optimum heat transfer characteristics in weak zones. Results are compared with circular shape annular fin. Circular shape annular fin outperforms in terms of overall rate of heat transfer at the cost of highest pressure drop. The heat transfer rate decreases by 18%, 21% and 31% in sectorial fin, elliptical fin and sectional fin as compared to that of circular fin at 12965 Reynolds number, but at other end pressure drop across a tube surface in case of these fins also decrease as compared to that of circular annular fin. Potential rate, ratio of heat transfer rate to required pumping power, is calculated to evaluate optimum fin performance. Potential rate of an elliptical fin is highest among all the reported cases.

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Section: Flow Behavioursupporting

confidence: 70%

Section: Modeling Of Computational Domainmentioning

confidence: 99%