Numerical Investigation of Turbulent Heat Convection from Solid and Longitudinally Perforated Rectangular Fins

Ismail, Muhammad; Reza, M.O.; Zobaer, M.A.; Ali, Mohammad

doi:10.1016/j.proeng.2013.03.152

Cited by 57 publications

(21 citation statements)

References 14 publications

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“…The recirculation zone around the lateral surfaces of fin reduced and fin effectiveness increased with an increase in number of perforations. A similar study as above has been conducted by Ismail et al numerically by using RNG‐based k ‐ε turbulence model to study turbulence flow parameters for perforated fins arrays. Fins with circular perforations showed remarkable heat transfer enhancement and reduced pressure drop.…”

Section: Review Of Literaturementioning

confidence: 78%

Numerical validation of natural convection heat transfer with horizontal rectangular fin array using straight knurling patterns on fins—correlation for Nusselt number

Chikurde¹,

Kothavale²,

Sane³

2019

Heat Trans. Asian Res.

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Natural convection heat transfer from horizontal rectangular fin array with various knurling patterns has been studied experimentally by the present authors to investigate the effect of knurl-produced surface roughness of fin on the heat transfer rate. The parameters like knurling height from base, knurling depth, fin spacing, and supply wattage were considered for parametric study. In the present paper, numerical method (CFD) is used to simulate natural convection phenomena with knurled fins and results are validated with the experimental data available from literature. The numerical results show similar trends compared with experimental data and one can use this method to study various fin configurations for knurling patterns. The flow patterns from experiments and numerical method are compared for different supply wattages and fin spacing to back up the conclusion. It is also observed that the variation in nondimensional roughness depth and spacing (D kn /H and S/H) have more effect on Nusselt number than roughness height parameter (H kn /H). Further, the method is extended to study numerically large number of fin configurations with knurling patterns to gather sufficient data for Nusselt number with respect to fin Heat Transfer-Asian Res. 2019;48:1622-1647. wileyonlinelibrary.com/journal/htj

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Section: Review Of Literaturementioning

confidence: 78%

Numerical validation of natural convection heat transfer with horizontal rectangular fin array using straight knurling patterns on fins—correlation for Nusselt number

Chikurde¹,

Kothavale²,

Sane³

2019

Heat Trans. Asian Res.

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“…RNG j-e turbulent model was utilized [24] to solve the complicated turbulent thermal flow field with Enhanced Wall Function approach in the near-wall regions to fit the wall boundary conditions [25]. The solid regions, fins and the heat sink base, were also considered, where only the heat diffusion equation is solved.…”

Section: Problem Description and Boundary Conditionmentioning

confidence: 99%

“…Using Reynolds Normalized Group (RNG) based k-e turbulent model to improve the cooling performance of solid and perforated fins that are mounted on a flat plate a three dimensional (3D) numerical study was conducted [24]. Perforations was such as small channels of square and circular cross sections are arranged along with stream wise fin's length.…”

Section: Introductionmentioning

confidence: 99%

“…They found that the fins of circular perforations have remarkable heat transfer enhancement and reduced pressure drop. The review shows that the performance of the heat sink in a cross-flow is influenced remarkably by the flow velocity and the geometry of the perforation in heat sink based on [24] results. So, this work aims at investigating experimentally and numerically the effectiveness of using different pin-fin arrangements to decrease the bypass effect.…”

Section: Introductionmentioning

confidence: 99%

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Studying the performance of solid/perforated pin-fin heat sinks using entropy generation minimization

Elsayed

Mesalhy

2014

Heat Mass Transfer

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Heat transfer and pressure drop characteristics of a set of pin-fins with uniform heat flux were investigated experimentally and numerically. Test set-up was designed to assess the effects of mass flow rate, fin height, and fin density on convection heat transfer and pressure drop. In the numerical investigation, the flow field of various design parameters of the heat sink was simulated. It was found that heat sinks having fin heights of 20 and 30 mm operated at a lower Reynolds number reached minimum value for thermal resistance when the fin density 10 9 10. Which means it is the optimum number of fins for this case. Also, friction factor increased with a decrease in the bypass flow area or inter-fin distance spacing and using perforated fins reduced the pressure losses and thermal resistance for all studied cases. List of symbolsD hd Duct hydraulic diameter (m) E Total energy per unit mass (J/kg) H Fin height (m) L Heat sink foot print length (m) N Number of fins P 1 Channel inlet pressure (N/m 2 ) P L Non-dimensional pitch = (a ? b)/a Q Heat input (W) R th Total thermal resistance (K/W) Re D Reynolds number using D h V d Duct velocity (m/s) S g Entropy generation minimization h Heat transfer coefficient (W/m 2 K) b Fin spacing (m) a Fin side thickness (m) y ?Dimensionless wall distanceGreek symbols e Turbulent dissipation rate (m 2 /s 5 ) lAbsolute viscosity (Pa s) bOpen area ratio (%) qDensity (kg/m 5 ) DP Pressure drop across heat sink (N/m 2 )

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“…al. [3] has studied on the heat transfer enhancement in longitudinal perforated fins that perforated fins has the higher surface contact area, minimum pressure drop, more effectiveness. It is found that circular and square fins are almost the same amount of heat removal rate, but circular perforated fins have significantly less pressure drop.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Enhancement Through Perforated Fin

Salam¹

2017

IOSR JMCE

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Numerical Investigation of Turbulent Heat Convection from Solid and Longitudinally Perforated Rectangular Fins

Cited by 57 publications

References 14 publications

Numerical validation of natural convection heat transfer with horizontal rectangular fin array using straight knurling patterns on fins—correlation for Nusselt number

Numerical validation of natural convection heat transfer with horizontal rectangular fin array using straight knurling patterns on fins—correlation for Nusselt number

Studying the performance of solid/perforated pin-fin heat sinks using entropy generation minimization

Heat Transfer Enhancement Through Perforated Fin

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