A novel heat sink design with interrupted, staggered and capped fins

The rapid development in the field of electronics has led to high power densities and miniaturization of electronic packages. Because of the compact size of electronic devices, the rate of heat dissipation has increased drastically. Due to this reason, the air-cooling system with a conventional heat sink is insufficient to remove large quantity of heat. A novel macro-channel ?L-shaped heat sink? is proposed and analyzed to overcome this problem. The thermal resistance and fluid flow behavior under natural convection, of the novel and conventional air-cooled heat sink designs, are analyzed. Governing equations are discretized and solved across the computational domain of the heat sink, with three-dimensional conjugate heat transfer model. Numerical results are validated through experimentation. The effect of parameters i.e., fin height, number of fins and heat sink size, on the thermal resistance and fluid flow are reported. Examination of these parameters provide a better physical understanding from energy conservation and management view point. Substantial increase in the thermal performance is noted for the novel ?L-shaped heat sink? compared to the conventional design.

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“…For three-dimensional laminar flow, the momentum, continuity and thermal energy equations can be demonstrated as follows [27]:…”

Section: Mathematical Model Description 21 Governing Equationsmentioning

confidence: 99%

Thermal analysis of proposed heat sink design under natural convection for the thermal management of electronics

2022

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“…It was noted that micro mixer was 1.56 times better than micro channel. Mousavi et al, [17] recently studied ten various configurations of interrupted, staggered and capped finned heat sink to find optimum configuration. It was noted that enough space between the fins to improve the cooling performance and capped fin enhanced the heat transfer rate.…”

Section: Introductionmentioning

confidence: 99%

Numerical Optimization of a CPU Heat Sink Geometry

Bangalee

Rahman

Zaimi

et al. 2021

CFDL

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During its operation CPU dissipates undesirable heat. Therefore, heat sink is very essential in modern computing system to absorb extra heat dissipated by the CPU. Forced convection air cooling is common approach. In the present work, a steady-state convective heat transfer process is analyzed for CPU cooling. A rectangular fin heat sink equipped in a computer chassis is numerically investigated and simulated using the software ANSYS CFX. A two-equation based turbulence model is chosen to capture the turbulence of the flow inside the domain. The overall dimension of the heat sink is optimized for three different parameters of the heat sink such as fin quantity, fin height and baseplate thickness. An optimum fin quantity, fin height and baseplate thickness are found, and, respectively. Two different orientations of fins are also compared. Better thermal performance is achieved when the fin channel is perpendicular to the surface parallel to the outlet. The average temperature of the heat sink is found. It is also predicted that the heat sink studied here is capable to keep the CPU temperature underthat is reasonably acceptable.

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“…The heat sink is fitted with fins to increase and improve heat dissipation [6]. A cooling medium is used through the heat sink, and this medium may be air, water or one of the nanofluids [7][8][9][10][11][12][13]. One of the most famous techniques used is the forced convection heat sink with air as a cooling medium, and this is needed for ease of maintenance, low cost, and simplicity.…”

Section: Introductionmentioning

confidence: 99%

Effect of Pitch Ratio and Diagonal Length of Pin Fin of Heat Sink on Convective Heat Transfer for Turbulent Flow Condition

Algburi¹,

Pazarlıoğlu²,

Arslan³

2021

European Journal of Science and Technology

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In this study, the impact of pitch ratio and diagonal length of pin fin on the heat sink has been numerically investigated to determine the thermo-hydraulic performance of heat sink under turbulent flow regime. Usage of pin fin on the heat sink has been preferred due to less pressure drop in comparison with general fin type. While the pitch ratio has been changed 0.75 ≤ P/e ≤ 1.1, the length of edge of fin has been changed 3 ≤ Lef ≤ 6 as geometric parameters. The working range of the study has been considered as turbulent flow regime (2658 ≤ Re ≤ 7138). The computational study has been carried out on ANSYS Fluent 2020R2 using SST k-ω with low-Re correction model to calculate RANS equations. The factors, which define thermo-hydraulic performance of the study, such as average Nusselt number, average Darcy friction factor, and thermal resistance has been elucidated in detail. Also, to detect flow characteristics comprehensively, the contours have been created for vorticity, temperature, and velocity streamline. As a results of overall assessment of this study, it is concluded that the maximum convective heat transfer performance has been obtained using Case 12 by 52% compared with the Case 1 at Re=7138.

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A novel heat sink design with interrupted, staggered and capped fins

Cited by 50 publications

References 25 publications

Thermal analysis of proposed heat sink design under natural convection for the thermal management of electronics

Thermal analysis of proposed heat sink design under natural convection for the thermal management of electronics

Numerical Optimization of a CPU Heat Sink Geometry

Effect of Pitch Ratio and Diagonal Length of Pin Fin of Heat Sink on Convective Heat Transfer for Turbulent Flow Condition

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