Investigation of natural convection heat transfer performance of the QFN-PCB electronic module by using nanofluid for power electronics cooling applications

Purusothaman, A.

doi:10.1016/j.apt.2018.01.018

Cited by 53 publications

(13 citation statements)

References 24 publications

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“…Nanofluids are modern fluids which are consisted with base fluid such as water, ethylene glycol, oil, etc., and solid particles such as Al, Cu, Ag, MWCNTs, etc. (Purusothaman et al, 2016a(Purusothaman et al, , 2016b(Purusothaman et al, , 2016c(Purusothaman et al, , 2016dPurusothaman, 2018). First, Chol (1995) proposed the term of "Nanofluid".…”

Section: Governing Equationsmentioning

confidence: 99%

A comprehensive review on natural convection flow and heat transfer

Rahimi

Saee

Kasaeipoor

et al. 2019

HFF

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Purpose The purpose of this paper is to carry out a comprehensive review of some latest studies devoted to natural convection phenomenon in the enclosures because of its significant industrial applications. Design/methodology/approach Geometries of the enclosures have considerable influences on the heat transfer which will be important in energy consumption. The most useful geometries in engineering fields are treated in this literature, and their effects on the fluid flow and heat transfer are presented. Findings A great variety of geometries included with different physical and thermal boundary conditions, heat sources and fluid/nanofluid media are analyzed. Moreover, the results of different types of methods including experimental, analytical and numerical are obtained. Different natures of natural convection phenomenon including laminar, steady-state and transient, turbulent are covered. Overall, the present review enhances the insight of researchers into choosing the best geometry for thermal process. Originality/value A comprehensive review on the most practical geometries in the industrial application is performed.

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Section: Governing Equationsmentioning

confidence: 99%

A comprehensive review on natural convection flow and heat transfer

Rahimi

Saee

Kasaeipoor

et al. 2019

HFF

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“…Modifying heat transfer is a principal matter of concern for energy conservation and also advantageous from an economic viewpoint. Since heat exchangers are commonly used in almost all areas of industrial activities, including fuel cells [1], electronic device cooling [2], solar air collectors [3], aerospace engineering [4], flame stabilization [5], refrigeration [6], electric vehicles [7], natural gas liquefaction [8], air dehumidification [9] and so forth, increasing the thermal performance is of vital importance. To satisfy such a need, in the last two decades, researchers have proposed different passive techniques for heat transfer augmentation, including roughness elements [10], twisted tapes [11] and wires inserts [12].…”

Section: Introductionmentioning

confidence: 99%

Thermo-Hydraulic Performance Analysis on the Effects of Truncated Twisted Tape Inserts in a Tube Heat Exchanger

Ghalambaz

Mashayekhi²,

Arasteh

et al. 2020

Symmetry

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This paper investigates the convective heat transfer in a heat exchanger equipped with twisted tape elements to examine effects of the twisted tape truncation percentage, pitch value, position and Reynolds number using 3D numerical simulation. A symmetric heat flux is applied around the tube as the studied heat exchanger. Based on the influences in both heat transfer enhancement and pressure drop, the performance evaluation criterion (PEC) is utilized. Inserting twisted tape elements and reducing the pitch value significantly augment the Nusselt number, friction coefficient and PEC number compared to the plain tube. For the best case with a Reynolds number of 1000, the average Nusselt number increases by almost 151%, which is the case of fully fitted twisted tape at a pitch value of L/4. Moreover, increasing the twisted tape truncation percentage reduces both heat transfer and pressure drop. Furthermore, the highest heat transfer rate is achieved when the truncated twisted tape is located at the entrance of the tube. Finally, it is concluded that for P = L, L/2, L/3 and L/4, the optimum cases from the viewpoint of energy conservation are twisted tapes with truncation percentages of 75, 50, 50 and 0%, in which the related PEC numbers at a Reynolds number of 1000 are almost equal to 1.08, 1.24, 1.4 and 1.76, respectively.

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“…Unconventional reservoirs have drawn intensive attention recently [ 1 ], and fractal-based approaches are key methods used to characterize the pore structure, physical properties, and fluid flow in them under different mechanisms [ 2 , 3 , 4 ]. One of the basic problems that has been investigated deeply in the last few decades is the natural convection mode of heat transfer that serves in a number of engineering applications, for example solar collectors [ 5 , 6 ], fuel cell industry [ 7 ], petroleum engineering [ 8 , 9 ], and cooling of electronic components [ 10 , 11 ], etc. The unsatisfying heat-transfer rate due to the natural convection, however, is a significant issue for the application.…”

Section: Introductionmentioning

confidence: 99%

Entropy Generation Optimization for Rarified Nanofluid Flows in a Square Cavity with Two Fins at the Hot Wall

Al‐Kouz

Almuhtady

Owhaib

et al. 2019

Entropy

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Computational Fluid Dynamics (CFD) is utilized to study entropy generation for the rarefied steady state laminar 2-D flow of air-Al2O3 nanofluid in a square cavity equipped with two solid fins at the hot wall. Such flows are of great importance in industrial applications, such as the cooling of electronic equipment and nuclear reactors. In this current study, effects of the Knudsen number (Kn), Rayleigh number (Ra) and the nano solid particle’s volume fraction (ϕ) on entropy generation were investigated. The values of the parameters considered in this work were as follows: 0≤ Kn ≤0.1, 103 ≤Ra≤ 106, 0≤ ϕ ≤ 0.2. The length of the fins (LF) was considered to be fixed and equal to 0.5 m, whereas the location of the fins with respect to the lower wall (HF) was set to 0.25 and 0.75 m. Simulations demonstrated that there was an inverse direct effect of Kn on the entropy generation. Moreover, it was found that when Ra was less than 104, the entropy generation, due to the flow, increased as ϕ increases. In addition, the entropy generation due to the flow will decrease at Ra greater than 104 as ϕ increases. Moreover, the entropy generation due to heat will increase as both the ϕ and Ra increase. In addition, a correlation model of the total entropy generation as a function of all of the investigated parameters in this study was proposed. Finally, an optimization technique was adapted to find out the conditions at which the total entropy generation was minimized.

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Investigation of natural convection heat transfer performance of the QFN-PCB electronic module by using nanofluid for power electronics cooling applications

Cited by 53 publications

References 24 publications

A comprehensive review on natural convection flow and heat transfer

A comprehensive review on natural convection flow and heat transfer

Thermo-Hydraulic Performance Analysis on the Effects of Truncated Twisted Tape Inserts in a Tube Heat Exchanger

Entropy Generation Optimization for Rarified Nanofluid Flows in a Square Cavity with Two Fins at the Hot Wall

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