A numerical parametric study to enhance thermal hydraulic performance of a novel alternating offset oblique microchannel

Panse, Sanskar S.; Ekkad, Srinath V.

doi:10.1080/10407782.2021.1872259

Cited by 8 publications

(2 citation statements)

References 37 publications

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“…34 According to these investigations, small fin pitches with a narrow channel and short fin angle are best for enhancing thermal performance. Further boosting thermal performance, Panse et al 35 configured the oblique fins in a transverse direction, which was alternatively offset about their centerline. The effect of these oblique fin configurations was computationally investigated in order to acquire better results.…”

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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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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“…These studies show that the small oblique fin angle and small fin pitch with narrow channel are preferable for enhancing thermal performance. To further improve the thermal performance, Sanskar et al 27 arranged the oblique fins and alternatively offset about their centreline in the transverse direction. The influence of these oblique fin arrangements was analysed numerically for better results.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer enhancement using elliptical fin microchannel

Peddigari

Kupireddi

Balasubramanian

et al. 2021

Asia-Pacific J Chem Eng

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Thermal performance and fluid flow characteristics of elliptical fin microchannel are numerically investigated by varying fin orientation in the laminar flow region. Six distinctly oriented elliptical fins ranging 0 -12 along channel length are numerically examined for inlet Reynolds number (Re) ranging 174-748. The same is compared with the conventional straight fin microchannel. It is found that continuous straight fin when replaced with a series of short length elliptical fins leads to re-establishment of the thermal boundary layer and results in thinning of boundary layer thickness. By varying the fin angle, fluid is directed from primary channel to secondary channel which finally flows into the primary channel. These secondary flows disrupt the boundary layer and show better fluid mixing in the channel. Among all the orientations considered, elliptical fin oriented at 2 yields better cooling performance ensuing an optimum average Nusselt number enhancement of 116% (7.68-16.64) with a very less pressure penalty (15%). Besides this, the rise in wall temperature is reduced by 25.39% in comparison to straight fin microchannel.

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A critical review on recent developments and applications of microchannels in the field of heat transfer and energy

Kambli

Dey

2023

Heat Mass Transfer

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A numerical parametric study to enhance thermal hydraulic performance of a novel alternating offset oblique microchannel

Cited by 8 publications

References 37 publications

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

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

Heat transfer enhancement using elliptical fin microchannel

A critical review on recent developments and applications of microchannels in the field of heat transfer and energy

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