Mixed convective heat-transfers in a porous channel with sintered copper beads

Tzeng, Sheng‐Chung; Jywe, Wen-Yuh; Lin, Chu-Wei; Wang, Yen-Chan

doi:10.1016/j.apenergy.2004.06.004

Cited by 17 publications

(10 citation statements)

References 6 publications

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“…Convection heat transfer was lower in non-sintered porous plate channels than in sintered porous plate channels. Tzeng et al (2005) experimentally studied mixed convection heat transfer in a rectangular porous channel with sintered copper beads. The effects of the average particle size of the sintered porous shot-copper and porosity with varying Reynolds number and heat flux were investigated.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of Combined Convection Heat Transfer and Fluid Flow around Circular Cylinder through Rectangular and Trapezoidal Open-Cell Aluminum Foams

Mahdi

Mohammed

Munisamy

et al. 2015

Chemical Engineering Communications

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Combined convection heat transfer and fluid flow around a circular cylinder surface placed in open-fcell aluminum foams and subjected to constant heat flux inside a rectangular, water-filled horizontal channel was numerically and experimentally studied. Two models (rectangular and trapezoidal open-cell aluminum foam shapes) made of 6101-T6 alloy with pore densities of 10 and 40 pores per linear inch (PPI) and 7-9% relative density were employed as test sections. The aluminum foam dimensions were 35.7 Â 35.7 Â 36.85 mm, the Reynolds number range was 60-2000, and the modified Grashof number range was 2 Â 10 2 -2.6 Â 10 7 . Governing equations (continuity, momentum, and energy) were solved using the finite-volume method (FVM). Effects of the porous characteristics of aluminum foams and mixed convection heat transfer parameters on buoyancy force, Nusselt number, friction factor, and pumping power values of the two models were investigated. The results show that high mixed convection occurred with the trapezoidal model. A high average Nusselt number value was obtained at 40PPI in the rectangular model. In the trapezoidal model, average Nusselt number decreased with increased aluminum foam pore density. Friction factor increased slightly with increasing modified Grashof number and decreased with increasing Reynolds number. Pumping power increased with increased pore density of aluminum foam and mixed convection parameters. The comparison shows good agreement between the numerical and experimental work and that the average results produced have an 8.02% deviation in average Nusselt number.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of Combined Convection Heat Transfer and Fluid Flow around Circular Cylinder through Rectangular and Trapezoidal Open-Cell Aluminum Foams

Mahdi

Mohammed

Munisamy

et al. 2015

Chemical Engineering Communications

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“…The porous medium serves to enhance both the contact surface area-to-volume ratio and the high-velocity mixing of the fluid, and these in turn enhance the heat transfer coefficient [1]. Previous studies showed that the heat transfer performance of a channel can be improved if the geometric parameters, distribution of porous medium, or porosity conditions in the duct (or channel) are designed properly [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. With such improvements, the porous-MCHS could become suitable for applications to the cooling systems of electronic devices.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Design Parameters for a Sandwich-Distribution Porous-Microchannel Heat Sink

Hung

Yan

2014

Numerical Heat Transfer, Part A: Applications

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This study optimizes the thermal performance of a microchannel heat sink with a sandwichdistribution porous medium using the geometric variables as search parameters. The optimal approach integrates the simplified conjugate-gradient method and a three-dimensional porous heat sink model as an optimiser. The proposed optimal design parameters, i.e., the channel number, channel width, and porous medium thickness, enhance the thermal performance by 50% and reduce the pressure drop by 52.2% over those of a porous-heat sink without geometric optimisation. The proposed combined approach is robust because the same optimal set of parameters is obtained with different initial guesses. Simulations indicate that the optimal thermal resistance decreases and the corresponding optimal values of both the channel number and the porous medium thickness increase, whereas the channel width decreases with increasing pumping power. However, the effectiveness reduces significantly at high pumping power. Additionally, the effects of porosity of the porous medium on the optimal thermal resistance are insignificant.

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“…They indicated that the heat transfer capacity of the sintered-bronze-bead channel is 15 and 30 times that of the empty channel separately by using water and air as the coolant. Tzeng et al [6] experimentally discussed the effect of bead diameter on the forced convection heat transfer of sintered porous material. They indicated that the sintered porous material of smaller bead diameter was desired by the higher heat transfer requirement.…”

Section: Introductionmentioning

confidence: 99%

Heat transfer measurement of the cylindrical heat sink with sintered-metal-bead-layers fins and a built-in motor fan

Jeng

Tzeng

2014

International Communications in Heat and Mass Transfer

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Mixed convective heat-transfers in a porous channel with sintered copper beads

Cited by 17 publications

References 6 publications

Experimental and Numerical Investigation of Combined Convection Heat Transfer and Fluid Flow around Circular Cylinder through Rectangular and Trapezoidal Open-Cell Aluminum Foams

Experimental and Numerical Investigation of Combined Convection Heat Transfer and Fluid Flow around Circular Cylinder through Rectangular and Trapezoidal Open-Cell Aluminum Foams

Optimization of Design Parameters for a Sandwich-Distribution Porous-Microchannel Heat Sink

Heat transfer measurement of the cylindrical heat sink with sintered-metal-bead-layers fins and a built-in motor fan

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