Experimental and numerical investigations on optimal distribution of heat source array under natural and forced convection in a horizontal channel

Durgam, Shankar; Venkateshan, S. P.; Sundararajan, T.

doi:10.1016/j.ijthermalsci.2017.01.017

Cited by 47 publications

(16 citation statements)

References 30 publications

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“…Durgam has illustrated a study related to conjugate mixed convection heat transfer analysis for optimal arrangement of heat sources placed in a horizontal channel [18]. The experimental results are validated with numerical results obtained by COMSOL multi-physics 4.3 version package.…”

Section: Introductionmentioning

confidence: 85%

“…It is clear from the above illustrated literature that, the investigation carried out were focused on the optimal spacing problems related to the arrangements of heat generating sources placed in a channel (Vertical/horizontal) or stack of heated plates subjected to forced, free and mixed convection flow regime with or without considering the conjugate condition [5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Numerical studies reported by the Ramis et al were associated with single heat generating plate subjected to forced convection flow of coolant under conjugate, laminar, incompressible flow condition [3,4].…”

Section: Introductionmentioning

confidence: 99%

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Temperature and Location of Hot Spots Variation with Spacing in a Vertical Parallel Plate Channel: Conjugate View

Mohammad¹,

Afzal²,

Razak³

et al. 2019

IJHT

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The objective of present investigation is twofold, one to determine the effect of operational parameter on maximum temperature (Hot spots temperature) in heat generating (uniform and non-uniform) vertical parallel plates and two is to find out the position of maximum temperature (hot spots location) when plates are placed apart at optimum spacing (Bopt). A conjugate two dimensional laminar forced convection analysis is carried out in which the equations regulating the heat and fluid flow are solved by using finite difference numerical technique and the obtained algebraic equations are solved by using Thomas algorithm. The parameters viz Reynolds Number (ReH), Conduction-Convection parameter (Ncc), Heat generation parameter (Qt), and Prandtl Number (Pr), Spacing between the plates (B) were considered for present study, while the aspect ratio (Ar) of the plate is kept constant. The major outcome of present study says that the location of hot spot is mainly affected by ReH and mode of heat generation (uniform and non-uniform). It is also found that the spacing between the plates (B), ReH, Pr and Ncc play a major role in reducing the hotspots temperature.

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Section: Introductionmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Temperature and Location of Hot Spots Variation with Spacing in a Vertical Parallel Plate Channel: Conjugate View

Mohammad¹,

Afzal²,

Razak³

et al. 2019

IJHT

View full text Add to dashboard Cite

show abstract

“…In the last decades, a significant number of papers have been published in specialized literature concerning the problem under consideration [1][2][3][4]. An excellent review on thermogravitational convection in enclosures for engineering applications was presented by Baïri et al [5].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Surface Radiation on the Passive Cooling of a Heat-Generating Element

2019

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Low-power electronic devices are suitably cooled by thermogravitational convection and radiation. The use of modern methods of computational mechanics makes it possible to develop efficient passive cooling systems. The present work deals with the numerical study of radiative-convective heat transfer in enclosure with a heat-generating source such as an electronic chip. The governing unsteady Reynolds-averaged Navier-Stokes (URANS) equations were solved using the finite difference method. Numerical results for the stream function-vorticity formulation are shown in the form of isotherm and streamline plots and average Nusselt numbers. The influence of the relevant parameters such as the Ostrogradsky number, surface emissivity, and the Rayleigh number on fluid flow characteristics and thermal transmission are investigated in detail. The comparative assessment clearly emphasizes the effect of surface radiation on the overall energy balance and leads to change the mean temperature inside the heat generating element. The results of the present study can be applied to the design of passive cooling systems.

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“…It is very evident from the above literature review that not much attention has been paid to conjugate heat transfer analysis of channels formed between plates, explicitly with volumetric energy generation. Though the previously reported work numerically and analytically performed conjugate heat transfer studies in channels, they were limited to plates and walls fitted with protruding heat sources. The studies reported by Ramis and colleagues considered the effect of volumetric heat generation in the plate under conjugate condition but were restricted to single plate analyses with external flow condition.…”

Section: Introductionmentioning

confidence: 99%

Effect of Prandtl number on the average exit temperature of coolant in a heat‐generating vertical parallel plate channel: A conjugate analysis

Afzal

Kaladgi

et al. 2018

Heat Trans. Asian Res.

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A coupled conduction–convection heat transfer analysis is carried out for a two‐dimensional rectangular, vertical parallel plate channel producing volumetric energy (uniform and nonuniform), subjected to laminar forced‐convection incompressible fluid flow under steady‐state conditions. The equations governing the thermal and flow field are solved by using finite difference method, and the resulting algebraic equations are solved by using the tridiagonal matrix algorithm method. Four coolants with their Prandtl numbers (Pr), namely, liquid sodium (Pr = 0.005), sodium‐potassium (Pr = 0.00753), lead (Pr = 0.02252), and helium (Pr = 0.666) are used for the present conjugate analysis. Effects of different thermal and fluid flow parameters such as Reynolds number (ReH) ranging from 500 to 1500, conduction–convection parameter (Ncc), and total heat generation (Qt) on average exit temperature (θae) of coolants are studied. From the obtained results, it is found that the θae of coolant strongly depends on Pr, ReH, Ncc, and Qt when the aspect ratio (Ar) is kept constant. It is also found that with a nonuniform rate of heat generation, the coolant θae is high compared to uniform heat generation rate, whereas with increasing Ncc, the θae decreases, and with increasing Qt, the θae increases irrespective of coolants.

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Experimental and numerical investigations on optimal distribution of heat source array under natural and forced convection in a horizontal channel

Cited by 47 publications

References 30 publications

Temperature and Location of Hot Spots Variation with Spacing in a Vertical Parallel Plate Channel: Conjugate View

Temperature and Location of Hot Spots Variation with Spacing in a Vertical Parallel Plate Channel: Conjugate View

The Influence of Surface Radiation on the Passive Cooling of a Heat-Generating Element

Effect of Prandtl number on the average exit temperature of coolant in a heat‐generating vertical parallel plate channel: A conjugate analysis

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