Experimental Analysis of Heat Transfer and Fluid Flow in Micro-Channel Heat Sink

Sharma, Rajesh; SinghGill, Amoljit; Dhawan, Vikas

doi:10.14810/ijmech.2016.5302

Cited by 6 publications

(7 citation statements)

References 22 publications

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“…However, the illustrated pictures are able to represent the effect of the residual stresses in the material. The information strongly supports an assumption that the elastic behaviour of the material cannot be predicted correctly without consideration of the residual stresses [15].…”

Section: Figure 1 End Grain Attacks From Outcropping Inclusions; Elosupporting

confidence: 68%

Independency of Elasticity on Residual Stress of Room Temperature Rolled Stainless Steel 304 Plates for Structure Materials

Parikin¹,

Allen²

2015

MST

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Mechanical strengths of materials are widely expected in general constructions of any building. These properties depend on its formation (cold/hot forming) during fabrication. This research was carried out on cold-rolled stainless steel (SS) 304 plates, which were deformed to 0, 34, 84, and 152% reduction in thickness. The tests were conducted using Vickers method. Ultra micro indentation system (UMIS) 2000 was used to determine the mechanical properties of the material, i.e.: hardness, modulus elasticity, and residual stresses. The microstructures showed lengthening outcropping due to stress corrosion cracking for all specimens. It was found that the tensile residual stress in a specimen was maximum, reaching 442 MPa, for a sample reducing 34% in thickness and minimum; and about 10 MPa for a 196% sample. The quantities showed that the biggest residual stress caused lowering of the proportional limit of material in stress-strain curves. The proportional modulus elasticity varied between 187 GPa and of about 215 GPa and was free from residual stresses. Abstrak Independensi Elastisitas pada Tegangan Sisa Plat Baja Tahan Karat 304 Rol Temperatur Kamar untuk BahanStruktur. Kekuatan mekanik bahan secara umum sangat dibutuhkan pada setiap konstruksi bangunan apapun. Sifat mekanik bahan ini dapat diperoleh bergantung pada cara pembentukannya (dingin atau panas) selama fabrikasi. Telah dilakukan penelitian pada plat SS 304 rol dingin, yang dideformasi 0, 34, 84, dan 152% reduksi ketebalan. Pengujian dilakukan dengan metode Vickers menggunakan ultra micro indentasi system (UMIS) 2000 untuk menentukan sifat mekanik material yaitu: kekerasan, modulus elastisitas dan tegangan sisa. Struktur mikro untuk semua spesimen memperlihatkan lempengan memanjang akibat stress corrosion cracking. Hasil memperlihatkan bahwa tegangan sisa tarik pada spesimen maksimum; mencapai 442 MPa untuk sampel 34% reduksi ketebalan dan minimum; sekitar 10 MPa untuk sampel 196% reduksi. Kuantitas ini menunjukkan bahwa tegangan sisa terbesar mampu menurunkan batas proporsional bahan dalam kurva tegangan-regangan. Proporsional modulus elastisitas bervariasi sekitar antara 187 GPa dan 215 GPa dan nilainya tidak bergantung pada besaran tegangan sisa.

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Section: Figure 1 End Grain Attacks From Outcropping Inclusions; Elosupporting

confidence: 68%

Independency of Elasticity on Residual Stress of Room Temperature Rolled Stainless Steel 304 Plates for Structure Materials

Parikin¹,

Allen²

2015

MST

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“…20 HEX, heat exchangers [Color figure can be viewed at wileyonlinelibrary.com] F I G U R E 2 A simple structure of MCHS: (A) stacked model and (B) computational domain. 13 MCHS, microchannel heat sinks conduction, 2,46,47 aspect ratio, 27,48,49 and viscous dissipation 2,50 are addressed as the possible reasons for the deviation from classical theory.…”

Section: Axial Heat T a B L E 1 Classification Of Heat Exchangers (Hementioning

confidence: 99%

“…Some studies show that heat transfer coefficient and pressure drop values can be calculated by using macroscale approach. 18,[20][21][22][23][24][25][26][27] However, others state that is not the case. [28][29][30][31][32][33] There are various claims why there may be a mismatch in between micro-and macroscale calculations such as scaling effect, fluid viscosity, variable thermophysical properties, entrance effect, and conjugate heat transfer.…”

Section: Introductionmentioning

confidence: 99%

“…However, the results of the publications are not consistent. Some studies show that heat transfer coefficient and pressure drop values can be calculated by using macroscale approach 18,20‐27 . However, others state that is not the case 28‐33 .…”

Section: Introductionmentioning

confidence: 99%

“…There are various claims why there may be a mismatch in between micro‐ and macroscale calculations such as scaling effect, fluid viscosity, variable thermophysical properties, entrance effect, and conjugate heat transfer 2,34‐39 . In addition, the effect of surface roughness, 2,30,40,41 electrical double layer (EDL), 42‐45 axial heat conduction, 2,46,47 aspect ratio, 27,48,49 and viscous dissipation 2,50 are addressed as the possible reasons for the deviation from classical theory.…”

Section: Introductionmentioning

confidence: 99%

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A review of heat and fluid flow characteristics in microchannel heat sinks

Çetkin

2020

Heat Trans

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Heat transfer and flow characteristic in microchannel heat sinks (MCHS) are extensively studied in the literature due to high heat transfer rate capability by increased heat transfer surface area relative to the macroscale heat sinks. However, heat transfer and fluid flow characteristics in MCHS differ from conventional ones because of the scaling effects. This review summarizes the studies that are mainly based on heat transfer and fluid flow characteristic in MCHS. There is no consistency among the published results; however, everyone agrees on that there is no new physical phenomenon in microscale that does not exist at macroscale. Only difference between them is that the effect of some physical phenomena such as viscous dissipation, axial heat conduction, entrance effect, rarefaction, and so forth, is negligibly small at macroscale, whereas it is not at microscale. The effect of these physical phenomena on the heat transfer and flow characteristics becomes significant with respect to specified conditions such as Reynolds number, Peclet number, hydraulic diameter, and heat transfer boundary conditions. Here, the literature was reviewed to document when these physical phenomena become significant and insignificant.

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Thermal management of microwave electronics in the radar system

Saravanan

Kumaraguruparan

2019

ISSS J Micro Smart Syst

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Experimental Analysis of Heat Transfer and Fluid Flow in Micro-Channel Heat Sink

Abstract: In this paper heat transfer in single phase through micro-channels was studied.

Cited by 6 publications

References 22 publications

Independency of Elasticity on Residual Stress of Room Temperature Rolled Stainless Steel 304 Plates for Structure Materials

Independency of Elasticity on Residual Stress of Room Temperature Rolled Stainless Steel 304 Plates for Structure Materials

A review of heat and fluid flow characteristics in microchannel heat sinks

Thermal management of microwave electronics in the radar system

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