Performance analysis of microchannel with different pin fin layouts

Jadhav, Subhash V.; Pawar, Prashant M.

doi:10.1002/jnm.2697

Cited by 9 publications

(5 citation statements)

References 24 publications

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“…The present study desired to examine the possibility of manipulation of neighbouring bubble pairs, and for the neighbouring bubbles in the u-Janus and d-Janus cases to stretch perpendicular to the flow direction during their pairwise merging phase. In this configuration, the greatest drag forces would be experienced by bubbles, while the pressure drop in single-phase regions were expected to be small [6,7].…”

Section: Chip Designmentioning

confidence: 99%

Manipulating Bubble Dynamics and Heat Transfer using 3D Superbiphilic Micro/Nanostructures

Salmean,

Qiu

2023

Proceedings of the 9th World Congress on New Technologies

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With the development and miniaturization of high density integrated circuits and multi-functions of electronic chips, the heat flux generated by the chips has been greatly increased, which becomes a bottleneck for further development. Therefore, it is emergent to develop new and efficient thermal management techniques for electronics cooling. Phase change heat transfer, such as boiling and evaporation, is a promising technique for the cooling of electronic devices. However, the prevention of vapor film formation is a fundamental challenge for the enhancement of phase change systems, and an impetus therefore exists for the discovery of new techniques to segregate nucleation during their formation. It has been shown that the surface of the three-dimensional superbiphilic wettability patterns can control the bubble dynamics and phase transition process of the three-phase contact line, thereby greatly enhancing the heat transfer coefficient and critical heat flux of pool boiling and flow boiling with a range of geometries, orientations and morphologies in order to influence the surface-tension forces which resist the bubble's departure and wicking performance. Previous study also found that the concentration Marangoni effect using low-boiling-point multi-component working fluids may help further improve heat transfer performance. Therefore, it is of great interests to study the multiphase flow, wicking performance, heat and mass transfer and contact line dynamics on the three-dimensional superbiphilic wettability patterned surfaces. This talk will present our recently progresses in novel three-dimensional superbiphilic wettability patterns for enhancing phase change heat transfer and how to manipulate the liquid propagation coefficient using non-uniform micropillar array. The experimental results utilizing high speed visualization and timeresolved PIV systems will be presented.

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Section: Chip Designmentioning

confidence: 99%

Manipulating Bubble Dynamics and Heat Transfer using 3D Superbiphilic Micro/Nanostructures

Salmean,

Qiu

2023

Proceedings of the 9th World Congress on New Technologies

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“…It was also identified that the thermal performance surged with rising of coolant velocity and with fin height. They further studied 19 the effect of staggered elliptical fin layout on the thermal characteristic of the channel. The results indicated that the cooling performance of the staggered elliptical fin layout was better than the in‐line arrangement.…”

Section: Introductionmentioning

confidence: 99%

Comparative study of elliptical fin microchannel over oblique micro‐fin heat sinks

Peddigari

Kumar

Balasubramanian

et al. 2022

Asia-Pacific J Chem Eng

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In the present paper, the effect of elliptical fin and its orientation were computationally examined by considering equivalent fin cross-sectional area and height of oblique fin to enhance thermal performance. A total of seven distinctly oriented elliptical fin microchannel models were developed and analyzed using finite volume method for velocity range of 0.2 to 0.9 m/s at constant heat flux of 65 W/cm 2 . The results showed that the elliptical fin microchannel model reduced pressure drop significantly and consumed less pumping power than the oblique fin microchannel model. It was also found that the average Nusselt number initially increases with decreasing elliptical fin orientation angle and then it rapidly decreases on further reduction of orientation angle beyond 4 . The optimal performance factor for a 4 elliptical fin was 1.21, with only a 6.5% penalty in wall temperature at Re 436.Furthermore, the maximum pumping power reduction of 41.4% was found for the 4 elliptical fin microchannel model with a 2.3% increase in Nusselt number. Hence, for the same pumping power, the 4 elliptical fin microchannel model performs better than oblique fin microchannel.

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“…Jadhav et al. 32,33 compared the performance of microchannel heat sink based on three different layouts and shapes of fins such as ellipse, circle, square and hexagon and revealed that staggered arrangement boosts the heat transfer than inline arrangement. Yu et al.…”

Section: Introductionmentioning

confidence: 99%

“…Saravanan et al 31 compared the characteristics of heat transfer for micro pin fin and microchannel pin fin heat sink with different shapes of pin fins specifically square and circular and finds that due to secondary vortices generated, fins of square shape enhance the heat transfer when contrasted with the circular one. Jadhav et al 32,33 compared the performance of microchannel heat sink based on three different layouts and shapes of fins such as ellipse, circle, square and hexagon and revealed that staggered arrangement boosts the heat transfer than inline arrangement. Yu et al 34 proposed novel Piranha Pin Fin design to boost the heat transfer which is used in both either in a singlephase or in a double phase flow because of its vapour venting property.…”

Section: Introductionmentioning

confidence: 99%

Analysis of heat transfer enhancement in microchannel by varying the height of pin fins at upstream and downstream region

Khan

Karimi

2021

Proceedings of the Institution of Mechanical Engineers, Part E:

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In this study, a numerical analysis of a microchannel with the different configuration of varying height of pin fins entrenched at the bottom of the channel base wall has been carried out. Five different configurations of pin fins arrangement which are considered in this study are, Case 1(Full length fins in complete microchannel), Case 2(Full length fins at the upstream), Case 3(Full length fins at the downstream), Case 4(Full length fin at the center of microchannel), Case 5(Full length fins at the inlet and exit of microchannel) and the results of these five cases are compared with the plain rectangular microchannel. In this investigation, deionized ultra-filtered water is used and Reynold’s number is ranging from 150 to 350. Results reveals that the highest Nusselt number is achieved by case 2 at a lesser value of Reynold’s number while by case 5 at higher Reynold’s number and the lowest pressure drop is occurring in case 4. The overall thermal performance of case 2 beats the corresponding cases.

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Performance analysis of microchannel with different pin fin layouts

Cited by 9 publications

References 24 publications

Manipulating Bubble Dynamics and Heat Transfer using 3D Superbiphilic Micro/Nanostructures

Manipulating Bubble Dynamics and Heat Transfer using 3D Superbiphilic Micro/Nanostructures

Comparative study of elliptical fin microchannel over oblique micro‐fin heat sinks

Analysis of heat transfer enhancement in microchannel by varying the height of pin fins at upstream and downstream region

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