Thermo-Fluid Characteristics of Microchannel Heat Sink With Multi-Configuration NACA 2412 Hydrofoil Ribs

Ali, Shahzad Fateh; Ahmad, Faraz; Hassan, Mehdi; Rehman, Zabdur; Wadood, Abdul; Ahmad, Khurshid; Park, Herie

doi:10.1109/access.2021.3109077

Cited by 11 publications

(4 citation statements)

References 22 publications

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“…The effect of trefoil rib configurations on heat transfer and flow characteristics in MCHS were numerically examined and they found that the MC-SWTR configuration performs best with the trefoil ribs mounted on the opposite side wall [19,20]. Shazad et al [21] examined the effect of staggered and aligned configurations of NACA 2412 hydrofoil-shaped ribs on the hydraulic-thermal characteristics of MCHS and discovered that the staggered configuration provides the best overall performance.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs

et al. 2023

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This study proposes the use of symmetrical ogive-shaped ribs on the walls of microchannel heat sinks (MCHS) to improve their thermal performance with minimal pressure drop. The ribs are arranged in three different configurations: ribs attached to all channel walls (MC-SAWR), ribs attached to side channel walls (MC-SSWR), and ribs attached to the bottom channel wall (MC-SBWR). Numerical investigations are conducted using the laminar conjugate heat transfer model to study the flow and heat transfer characteristics of the MCHS. The augmentation entropy generation number and thermal enhancement factor criterion are used to quantify the overall hydrothermal performance of the MCHS. The results show that the inclusion of symmetrical ogive-shaped ribs improves the Nusselt number of MCHS. The MC-SAWR configuration shows the highest Nusselt number improvement of 13–50% compared to the smooth MCHS over the Reynolds number range of 100–1000. Additionally, the MC-SAWR configuration shows a maximum reduction of 58% in the total entropy generation rate as it has the smallest augmentation entropy generation number value of 0.42. In terms of the thermal enhancement factor criterion, the MC-SSWR configuration shows the highest performance at Reynolds numbers below 400, but the MC-SAWR configuration outperformed the MC-SSWR configuration at Reynolds numbers above 400. Therefore, the MC-SAWR configuration is the best configuration that provides high cooling performance.

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Section: Introductionmentioning

confidence: 99%

Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs

et al. 2023

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“…In accordance with the above passive technique, many researchers have adopted such strategies to enhance the performance of micro-channel heat sink 10 – 13 . For example, Li et al 14 numerically investigated dimple and pin fin using microchannel heat sinks with water cooling, enhancement of heat transfer, reduction in resistance properties.…”

Section: Introductionmentioning

confidence: 99%

Performance improvement and thermodynamic assessment of microchannel heat sink with different types of ribs and cones

Zhang

Ahmad

Khan

et al. 2022

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The present study aims to investigate the performance of microchannel heat sink via numerical simulations, based on the first and second law of thermodynamics. The heat transfer and flow characteristics of rectangular microchannel heat sinks have been improved by adding six different types of surface enhancers. The cross-sections include rectangular, triangular, and hexagonal-shaped ribs and cones. The cones have been created from the same cross-sections of ribs by drafting them at an angle of 45° orthogonal to the base, which is expected to decrease the pressure drop, dramatically. The performance of ribs and cones has been evaluated using different parameters such as friction factor, wall shear stress, entropy generation rate, augmentation entropy generation number, thermal resistance, and transport efficiency of thermal energy. The results of the present study revealed that the novel effect of coning at an angle of 45° reduces frictional losses (Maximum pressure drop reduced is 85%), however; a compromise on thermal behavior has been shown (Maximum Nusselt number reduced is 25%). Similarly, the application of coning has caused a significant reduction in wall shear stress and friction factor which can lead to reducing the pumping power requirements. Moreover, triangular ribs have more ability to transfer thermal energy than rectangular and hexagonal ribs. Furthermore, it has been examined in the present study that the trend of total entropy generation rate for triangular ribs decreases up to Re = 400 and then increases onwards which means that thermal losses are more significant than frictional losses at lower Reynolds number. However, frictional losses dominate over thermal losses at higher Reynolds numbers, where vortex generation takes place, especially in triangular ribs.

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“…Several studies have been conducted to investigate the effect of geometrical parameters of ribs on fluid and heat transfer characteristics of MCHS [20,21]. For example, Khan et al [22] performed numerical simulations to investigate the effect of channel aspect ratio (channel width to height ratio on hydrothermal characteristics of rectangular MCHS.…”

Section: Introductionmentioning

confidence: 99%

Computational Study of Hydrothermal Performance of Microchannel Heat Sink With Trefoil Shape Ribs

et al. 2022

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Traditional cooling technologies are now become inadequate for electronic chips cooling due to size reduction and increase in generated heat flux. Microchannel heat sink (MCHS) is promising candidate due to its superior cooling performance than its competitors. The aim of this study is to investigate the hydrothermal performance of MCHS with novel trefoil shape ribs. The three configurations of trefoil shape ribs are: MC-AWTR (all wall trefoil ribs), MC-SWTR (side wall trefoil ribs), and MC-BWTR (base wall trefoil ribs). The performance of microchannel is evaluated on the basis of thermal enhancement factor, thermal resistance, transport efficiency and entropy generation at Re=100-1000. The results predict that addition of trefoil ribs to walls of smooth microchannel significantly improve its thermal performance at cost of pressure penalty. Nusselt number and average heat transfer coefficient tends to increase with rise in Reynolds number while thermal resistance and entropy generation reduces. Highest pressure drop occurs for MC-AWTR configuration due to more obstruction of the fluid flow. MC-SWTR configuration has highest thermal enhancement factor among all configurations while MC-AWTR has lowest due to large pressure drop penalty at all Reynold number. So, overall MC-SWTR shows superior performance than any other considered trefoil rib configuration.

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Thermo-Fluid Characteristics of Microchannel Heat Sink With Multi-Configuration NACA 2412 Hydrofoil Ribs

Cited by 11 publications

References 22 publications

Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs

Heat Transfer Augmentation and Entropy Generation Analysis of Microchannel Heat Sink (MCHS) with Symmetrical Ogive-Shaped Ribs

Performance improvement and thermodynamic assessment of microchannel heat sink with different types of ribs and cones

Computational Study of Hydrothermal Performance of Microchannel Heat Sink With Trefoil Shape Ribs

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