Comparison between exact thermal boundary condition and harmonic mean conductivity condition at the solid–fluid interface for finite thickness shrouded non-isothermal fin array

Pathak, Kankan Kishore; Giri, Asis

doi:10.1016/j.apm.2016.12.014

Applied Mathematical Modelling

2017

DOI: 10.1016/j.apm.2016.12.014

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Comparison between exact thermal boundary condition and harmonic mean conductivity condition at the solid–fluid interface for finite thickness shrouded non-isothermal fin array

Kankan Kishore Pathak

Asis Giri

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Cited by 2 publications

References 20 publications

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A Comparative Numerical Study of Estimation of Velocity Components in Mixed Convection Through Vertical Shrouded Plate Finned Channel

Pathak¹,

Giri

Bhuyan³

et al. 2022

Journal of Thermal Science and Engineering Applications

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An attempt has been made to investigate the performance of two methods of estimation of free and forced convection velocity components present in mixed convection. For this present analysis, a vertically configured shrouded plate finned channel is considered. From the literature, it is observed that in the solution of mixed convection problems related to the various engineering applications, proper estimation of induced velocity and fan/pump velocity plays a vital role. For this cause, segregation of the velocity components of free and forced convection present in the mixed convection becomes important. There exist two methods available in the literature, namely, the natural convection computational fluid dynamics method used in the mixed convection computational fluid dynamics analysis under the same thermal and geometrical condition, and secondly forced convection decoupled method applying the same pressure drop in forced and mixed convection across the channel. Results of this study reveal that if the free or induced velocity component present in the mixed convection is assessed based on the forced convection decoupled method, the pumping power results may be more precise than the natural convection computational fluid dynamic method as in the later method calculation of the forced convection velocity component is underpredicted. A correlation of overall Nusselt number is suggested for a vertically configured shrouded dual-height plate finned channel evaluating appropriate Reynolds number through forced convection decoupled method.

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A Comparative Numerical Study of Estimation of Velocity Components in Mixed Convection Through Vertical Shrouded Plate Finned Channel

Pathak¹,

Giri

Bhuyan³

et al. 2022

Journal of Thermal Science and Engineering Applications

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A Comparative Study on a Shrouded Fin Array With and Without Its Finite Dimension in the Flow Geometry

Giri

Singh

2023

ASME Journal of Heat and Mass Transfer

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In numerical heat transfer analysis, despite the involvement of the finite dimension in the geometries of heat exchanging devices, these dimensions are frequently assumed to be adequately thin and hence neglected for the ease of analysis. But it may be essential to include the finite dimension of the heat transfer equipment which makes the study more realistic. There are numerical reports on fin heat transfer, which involve with and without consideration of the fin-thickness in the flow geometry. But there remains a dearth of literature in which the results of the fin heat transfer obtained from these considerations are compared. In this essence, an attempt has been made to compare the results obtained from a study of numerical heat transfer on a shrouded vertical fin array with and without consideration of fin-thickness in the flow geometry under mixed convection. From the present computations, it is noted that with the consideration of the fin-thickness, there is a possibility of an increase in axial pressure defect by around 45% indicating the requirement of higher pumping power. Again for the chosen range of parameters, overall Nusselt number increases by around 18% as compared to without fin-thickness that may arise due to altered heat transfer coefficient caused by higher velocity over the extended surface to accommodate finite fin dimension. Finally pressure drop and Nusselt number is correlated with the governing parameters including fin-thickness.

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Comparison between exact thermal boundary condition and harmonic mean conductivity condition at the solid–fluid interface for finite thickness shrouded non-isothermal fin array

Cited by 2 publications

References 20 publications

A Comparative Numerical Study of Estimation of Velocity Components in Mixed Convection Through Vertical Shrouded Plate Finned Channel

A Comparative Numerical Study of Estimation of Velocity Components in Mixed Convection Through Vertical Shrouded Plate Finned Channel

A Comparative Study on a Shrouded Fin Array With and Without Its Finite Dimension in the Flow Geometry

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