Flow and heat transfer in compact louvered fin surfaces

Cowell, T. A.; Heikal, Morgan; Achaichia, A.

doi:10.1016/0894-1777(94)00093-n

Cited by 58 publications

(22 citation statements)

References 6 publications

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“…Numerous efforts have been made to successfully predict the critical Reynolds number through correlations. Cowell et al [34], and Webb and Trauger [23] presented their correlations for critical Reynolds number that are shown in Equations (12) [34] correlation also show some offset, but they are relatively more accurate than those of Webb and Trauger [23]. The critical Reynolds number values calculated in this study are also compared with the ones published by Kim and Cho [21], and they performed an experimental study using geometries having F d of 20 mm only.…”

Section: Critical Reynolds Numbermentioning

confidence: 59%

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CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Saleem

Kim

2017

Energies

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Abstract:The air-side thermal-hydraulic performance of multi-louvered aluminium fin heat exchangers is investigated. A systematic numerical study has been performed to analyze the air-sde thermal hydraulic characteristics over a wide range of Reynolds number i.e., from 30 to 500. Air-side heat transfer coefficient and pressure drop were calculated and validated over the mentioned band of Reynolds numbers. The critical Reynolds number was determined numerically; and also the variation of flow pattern along with the air-side heat transfer coefficient and pressure drop in a multi-louvered heat exchanger associated with Re cri has been reported. Moreover, a parametric study of the multi-louvered aluminium fin heat exchangers was also performed for 36 heat exchanger configurations with the louver angles (19-31 • ); fin pitches (1.0, 1.2, 1.4 mm) and flow depths (16, 20, 24 mm); and the geometric configuration exhibiting the highest air-side heat transfer coefficient was reported. The air-side heat transfer coefficient and pressure drop results for different geometrical configurations were presented in terms of Colburn j factor and Fanning friction factor f ; as a function of Reynolds number based on louver pitch.

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Section: Critical Reynolds Numbermentioning

confidence: 59%

Section: Critical Reynolds Numbermentioning

confidence: 99%

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Saleem

Kim

2017

Energies

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“…The correlation presented by Cowell et al [28] (for Lp/Fp≤1) shows better results compared to the one formulated by Webb and Trauger [23] because of its dependency on the fin pitch parameter. Webb and Trauger (for Lp/Fp≤1.31) only associated the critical Reynolds number with louver angle, which predicts the critical Reynolds number values far from true values.…”

Section: Critical Reynolds Numbermentioning

confidence: 82%

“…Numerous efforts have been made to successfully predict the critical Reynolds number through correlations. Cowell et al [28], Webb and Trauger [23] presented their correlations for critical Reynolds number that are shown in Eq. (12) …”

Section: Critical Reynolds Numbermentioning

confidence: 99%

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Saleem¹,

Kim²

2017

Preprint

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Abstract:The air side thermal hydraulic performance of multi-louvered aluminium fin heat exchangers is investigated. A detailed study was performed to analyse the thermal performance of air over a wide range of Reynolds number i.e. from 30 to 500. Air-side heat transfer coefficient and air pressure drop were calculated and validated over the mentioned band of Reynolds numbers. Critical Reynolds number was determined numerically and the variation in flow physics along with the thermal and hydraulic performance of microchannel heat exchanger associated with has been reported. Moreover, a parametric study of the multi-louvered aluminium fin heat exchangers was also performed for 36 heat exchanger configurations with the louver angles (19-31°), fin pitches (1.0, 1.2, 1.4 mm) and flow depths (16, 20, 24 mm); and the geometric configuration exhibiting the highest thermal performance was reported. The air-side heat transfer coefficient and pressure drop results for different geometrical configurations were presented in terms of Colburn j factor and Fanning friction factor f, as a function of Reynolds number based on louver pitch.

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“…The effect of fin pitch and the number of tube rows on heat performance was studied by Somchai and Yutasak [6] and followed by others such as Manglik et al [7] who analyzed the effects of fin density on a low Reynolds number forced convection in threedimensional wavy plate fin compact channels. Besides, there are some studies through which the effect of tube shape or location on the performance of heat exchangers have been investigated [8][9][10][11][12][13]. Yonghan Kim [14] studied the effect of a large fin pitch on heat transfer characteristics in heat exchangers both numerically and experimentally.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of heat transfer augmentation through geometrical optimization of vortex generators

et al. 2010

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Abstract:In this paper a two-dimensional numerical simulation of a steady incompressible and turbulent model has been carried out to study the effects of vortex generators in a compact heat exchanger in a curvilinear coordinate system. The mesh which is applied in this study is boundary fitted and has been smoothed by a Laplace operator. Experimental data of a former study has been applied to validate the numerical results. The effects of geometrical variation are studied by adjusting vortex generators' inclination and relative cross location. The major issue of this study is the optimal trade-off by selecting an optimal geometric, considering the opposite influences of geometrical variation on Nusselt number and pressure drop.PACS (

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Flow and heat transfer in compact louvered fin surfaces

Cited by 58 publications

References 6 publications

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

CFD Analysis on the Air-Side Thermal-Hydraulic Performance of Multi-Louvered Fin Heat Exchangers at Low Reynolds Numbers

Numerical investigation of heat transfer augmentation through geometrical optimization of vortex generators

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