Empirical correlation of laminar forced convective flow in trapezoidal microchannel based on experimental and 3D numerical study

Kewalramani, Gagan V.; Hedau, Gaurav; Saha, Sandip K.; Agrawal, Amit

doi:10.1016/j.ijthermalsci.2019.05.001

Cited by 29 publications

(13 citation statements)

References 36 publications

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“…It is the same for the change of non-Newtonian fluid type (viscosity for the models of: Carreau, Cross and Herschel-Bulkley). 6) and (7) show the evolution of the Nusselt number for different fluids, namely Newtonian fluid, (dilating and pseudoplastic), Carreau, Cross, Herschel-Buckley. Recalling that, for (Br> 0), the fluid is being heated by the wall, and that for (Br <0), the fluid is being cooled.…”

Section: Validation Of Resultsmentioning

confidence: 99%

“…A number of research studies have been carried out to understand the fluid flow mechanism and heat transfer characteristics in microchannels with circular [1][2][3], parallel [4][5], annular, rectangular and cross-sectional plates. trapezoidal [6][7]. Compared to a circular duct, can be found in an elliptical passage because the perimeter of one elliptical configuration is wider than the other for the same cross section [8].…”

Section: Introductionmentioning

confidence: 99%

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Thermal Transfer Study of a Non-Newtonian Nanofluid Behavior in a Microduct

2022

IJM

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In this study, laminar flow forced convection heat transfer of a non-Newtonian nanofluid flowing inside a Micro conduit that is subjected to a constant wall temperature was investigated. By considering the effect of viscous dissipation. The effects of Brinkman numbers (Br), power low index (n) and nanoparticle concentrations (φ) on the developing temperature fields and the local Nusselt number were examined. The obtained results were validated with available solutions for the special cases of conventional fluids (φ = 0) and non-viscous dissipation effect (Br = 0). Bulk temperature distribution and local Nusselt number are presented graphically for Br = 0, 0.5, 1, -0.5 and 1 for non-Newtonian fluids described by the power-law model with the flow index n = 0.3, 1.0 and 3.0. The Nusselt numbers of nanofluids were obtained for different Al2O3 nanoparticle concentrations as well as various Brinkman numbers.

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Section: Validation Of Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal Transfer Study of a Non-Newtonian Nanofluid Behavior in a Microduct

2022

IJM

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“…The effect on the hydraulic behavior of the microchannel was negligible as the space between the micro-channels decreases from 50 μm to 0.5 μm [31]. The Nu and Poiseuille number are found to be raised with rising the AR and side angle [45].…”

Section: Geometric Improvementsmentioning

confidence: 89%

Recent Advancements in Thermal Performance Enhancement in Microchannel Heatsinks for Electronic Cooling Application

Korasikha¹,

Sharma²,

Rao³

et al. 2021

Heat Transfer - Design, Experimentation and Applications

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Thermal management of electronic equipment is the primary concern in the electronic industry. Miniaturization and high power density of modern electronic components in the energy systems and electronic devices with high power density demanded compact heat exchangers with large heat dissipating capacity. Microchannel heat sinks (MCHS) are the most suitable heat exchanging devices for electronic cooling applications with high compactness. The heat transfer enhancement of the microchannel heat sinks (MCHS) is the most focused research area. Huge research has been done on the thermal and hydraulic performance enhancement of the microchannel heat sinks. This chapter’s focus is on advanced heat transfer enhancement methods used in the recent studies for the MCHS. The present chapter gives information about the performance enhancement MCHS with geometry modifications, Jet impingement, Phase changing materials (PCM), Nanofluids as a working fluid, Flow boiling, slug flow, and magneto-hydrodynamics (MHD).

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“…Microchannels are a fundamental part of microfluidic systems. A number of researches have been conducted to understand the mechanism of fluid flow and heat transfer characteristics in microchannels with circular [1,2,3], parallel plates [4,5,6], annular [7,8,9], rectangular [10,11,12,13,14,15] and trapezoidal [16,17,18] cross-sections. Compared with a circular duct, a better thermal efficiency can be found in an elliptical passage because the perimeter of an elliptical configuration is wider than the other for the same cross-sectional area [19].…”

Section: Introductionmentioning

confidence: 99%

Thermally Developing Flow and Heat Transfer in Elliptical Minichannels with Constant Wall Temperature

Duan

et al. 2019

Micromachines

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Laminar convective heat transfer of elliptical minichannels is investigated for hydrodynamically fully developed but thermal developing flow with no-slip condition. A three-dimensional numerical model is developed in different elliptical geometries with the aspect ratio varying from 0.2 to 1. The effect of Reynolds number (25 ≤ Re ≤ 2000) on the local Nusselt number is examined in detail. The results indicate that the local Nusselt number is a decreasing function of Reynolds number and it is sensitive to Reynolds number especially for Re less than 250. The effect of aspect ratio on local Nusselt number is small when compared with the effect of Reynolds number on local Nusselt number. The local Nusselt number is independent of cross-section geometry at the inlet. The maximum effect of aspect ratio on local Nusselt number arises at the transition section rather than the fully developed region. However, the non-dimensional thermal entrance length is a monotonic decreasing concave function of aspect ratio but a weak function of Reynolds number. Correlations for the local Nusselt number and the thermal developing length for elliptical channels are developed with good accuracy, which may provide guidance for design and optimization of elliptical minichannel heat sinks.

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Empirical correlation of laminar forced convective flow in trapezoidal microchannel based on experimental and 3D numerical study

Cited by 29 publications

References 36 publications

Thermal Transfer Study of a Non-Newtonian Nanofluid Behavior in a Microduct

Thermal Transfer Study of a Non-Newtonian Nanofluid Behavior in a Microduct

Recent Advancements in Thermal Performance Enhancement in Microchannel Heatsinks for Electronic Cooling Application

Thermally Developing Flow and Heat Transfer in Elliptical Minichannels with Constant Wall Temperature

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