Effect of the baffle on the performance of a micro pin fin heat sink

Karami, Mahdi; Tashakor, S.; Afsari, Ahmad; Hashemi-Tilehnoee, M.

doi:10.1016/j.tsep.2019.100417

Cited by 25 publications

(6 citation statements)

References 18 publications

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“…On the other hand, (Karami et al, 2019), perform a numerical simulation of a heat sink with micro fins and placing a baffle for a water flow for a range of 50≤Re≤250. They investigate the type of baffle and its dimensions, with this they find out the effects of it on the overall performance of the heat sink.…”

Section: Journal Of Technological Engineeringmentioning

confidence: 99%

Numerical study of the influence of the micro pin fin arrangement on the thermal and hydraulic performance of a micro heat sink

ZUÑIGA-CERROBLANCO¹,

MONTECILLO-SILLERO²,

HORTELANO-CAPETILLO³

et al. 2022

JTEN

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In this project, a numerical study of the thermal and hydraulic performance in a micro pin fin heat sink is carried out. The micro heat sinks pin fins are used for cooling of electronic, due that every day a more powerful and smaller chips and electronic components are required. The geometric parameters to the build of the heat sink with micro pin fins are chosen in base of the geometric needs of the electronic chip, a circular geometry is used for the micro pin fin and inline and staggered arrangement for the micro pin fins distribution is used, different velocities in the inlet of the heat sink are used for development of the study. In the result section, the temperature contours and the thermal resistance of the different cases analyzed are reported, as well as the pressures distributions and the total pressure drop along the heat sink micro pin fin are reported too. Taken account the results, the optimal geometry for thermal and hydraulic performance of the heat sink micro pin fin is obtained.

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Section: Journal Of Technological Engineeringmentioning

confidence: 99%

Numerical study of the influence of the micro pin fin arrangement on the thermal and hydraulic performance of a micro heat sink

ZUÑIGA-CERROBLANCO¹,

MONTECILLO-SILLERO²,

HORTELANO-CAPETILLO³

et al. 2022

JTEN

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“…This technique can improve the cooling capability of the microchannel by increasing the solid surface area interacting with the coolant, intensifying flow blending and disrupting of boundary layer development (Kandlikar and Grande, 2004). The survey of the literature reveals the topic of the investigations, such as the analysis of flow entrance and exit configuration (Chein and Chen, 2009), the geometry of inlet and outlet plenums (Ong and Ku Shaari, 2020), microchannel cross-section shape (Gunnasegaran et al , 2010), the use of raccoon microchannels (Tiwari and Moharana, 2019), wavy microchannels (Tiwari and Moharana, 2020), dimples (Gong et al , 2016), vortex generators (Lu and Zhai, 2019), baffles (Karami et al , 2019) and pin fins. According to the literature, the use of pin fins in MCHSs significantly improves thermal performance.…”

Section: Introductionmentioning

confidence: 99%

Modified hexagonal pin fins for enhanced thermal-hydraulic performance of micro-pin fin heat sinks

Roozbehi

Targhi

Heyhat

et al. 2023

HFF

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Purpose This numerical study aims to investigate the modification of the hexagonal pin fin geometry to enhance both the thermal and hydraulic performance of the copper micropin fin heat sink with single-phase water coolant in a laminar regime. The heat sink performance evaluation criteria have been investigated for the parametric effects of vertex angle θ (10–120) and relative length (RL) (0.25–9) of hexagonal pin fins. Design/methodology/approach To carry out research and reduce the computational cost, only one heat sink unit is simulated and analyzed using periodic boundary conditions on the side walls and includes a hexagonal pin fin and half channel on both sides to reflect the structural characteristics completely. The governing equations are also solved using finite volume method. Findings The results reveal that θ = 60 and RL = 1 yield the optimum thermal performance and heat sink performance is significantly influenced by the vertex angle and RL. The modified hexagon geometry improves fluid flow behavior by reducing the volume of the recirculation region behind the pin fin, preventing its effects on the downstream pin fins and restricting the thermal boundary layer development on its straight side. At Re = 1,000, the modified geometry enhances the average Nusselt number by 24.46% and the thermal performance factor by 23.89%, demonstrating the potential of modified hexagonal pin fins to enhance micropin fin heat sink performance. Originality/value Prior studies suggest using the pin fins with a regular hexagonal cross-section to obtain better thermal performance. However, this comes with a higher pressure drop penalty. The modification of the hexagonal pin fin geometry has been investigated in this numerical study to enhance both the thermal and hydraulic performance of the micropin fin heat sink. Because little attention has been paid to the modification of the regular hexagonal pin fins, as a geometry inspired by natural honeycomb structures, its design optimization is relatively scarce, and a gap was felt in this field.

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“…For all the thermal systems, VGs helps de destruct thermal and hydrodynamic boundary layers, with are improve heat transfer execution [23][24][25][26][27][28]. Karami et al [29] numerically simulated by using ANSYS Fluent the effects of baffles on fluid flow and heat transfer characteristics of a micro channel heat sink. They used single segmental baffle, double segmental baffle, and triple segmental baffle for different overlaps namely 60%, 40%, 20% and 0%.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Heat Transfer Behaviors in Conical Pin Fins Heat Sinks

Souida¹,

Sahel²,

*³

et al. 2022

AMS

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The present study is a numerical investigation of the effect of the shape of pin fins on the overall performances of heat sinks. Conical shaped pin fins with varying conical size ratio (Hcp/d) are considered. Five geometrical cases are explored, namely Hcp/d = 0.167, 0.333, 0.500, 0.667 and 0.833. The distribution and values of temperature, Nusselt number, thermal resistance, pressure drop, as well as the hydrothermal performance factor are determined for various Reynolds numbers (up to 8,000). In addition, the performances of conical shaped fins are compared to those of the cylindrical fins. The obtained results revealed a decrease in the thermal resistance with increasing Re and Hcp/d ratio. At Re = 8000 and when changing (Hcp/d) from 0.167 to 0.833, the thermal resistance is decreased from 192.30% to 83.52% compared to the cylindrical pin fins. However, the increased (Hcp/d) ratio yields an increase in the pressure drop. At Re = 8000, the values of pressure drop for the conical fins are lower than those of the cylindrical fins by 343.32%, 275.92%, 205.79%, 144.86% and 100.38% for Hcp/d = 0.167, 0.333, 0.500, 0.667 and 0.833, respectively. The values of the hydrothermal performance factor (h) for the conical fins are greater than those of the cylindrical fins. Also, an increase in (h) values is observed with decreasing Hcp/d ratio. The highest (h) value of 1.51 is reached with the case Hcp/d = 0.167 at Re = 8,000.

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Effect of the baffle on the performance of a micro pin fin heat sink

Cited by 25 publications

References 18 publications

Numerical study of the influence of the micro pin fin arrangement on the thermal and hydraulic performance of a micro heat sink

Numerical study of the influence of the micro pin fin arrangement on the thermal and hydraulic performance of a micro heat sink

Modified hexagonal pin fins for enhanced thermal-hydraulic performance of micro-pin fin heat sinks

Numerical Simulation of Heat Transfer Behaviors in Conical Pin Fins Heat Sinks

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