Heat Enhancement Using Aluminum Metal Foam: Experimental and Numerical Approach

Welsford, Christopher; Thanapathy, P.; Bayomy, Ayman M.; Ren, Mingzhang; Saghir, M.Z.

doi:10.1615/jpormedia.2020026859

Cited by 11 publications

(9 citation statements)

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“…Figure 1 presents the model under investigation. This model has been investigated numerically and experimentally by different researchers [1][2][3][4][5] in the absence of porous foam or fully filled with porous foam. In the present study, the channels are plain channels and a porous metallic foam strip having different thickness have been attached at its walls.…”

Section: Problem Descriptionsmentioning

confidence: 99%

“…Welsford et al [3] and Plant and Saghir [5,6] conducted experimental measurement of temperature in three channels configuration identical to the one shown in Figure 1. With respect to Welsford the channels were filled with metallic foam and the one conducted by Plant and Saghir were clear channels with no porous area.…”

Section: Comparison With Experimental Datamentioning

confidence: 99%

“…In one hand porous media help heat extraction but at the expenses of pressure drop. Welsford et al [3] and Delisle et al [4] investigated numerically and experimentally the use of nanofluid with different nanoparticles concentration as a mean to enhance the heat extraction. They demonstrated that such approach is feasible but the pressure drop is noticeable as well.…”

Section: Introductionmentioning

confidence: 99%

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Novel Approach of Heat Rate Enhancement in a Rectangular Channels with Thin Porous Layer at the Channel Walls

Saghir¹

2021

Preprint

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Heat enhancement is a topic of great interest nowadays due to its different application in industries. Porous material also known as metallic foam plays a major role in heat enhancement at the expenses of pressure drop. Flow in channels demonstrate the usefulness of this technology in heat extraction. In our current study, a porous strip attached to the channels walls is proposed as an alternative for heat enhancement. The thickness of the porous strip was varied for different Reynolds number. By maintaining laminar regime and using water as fluid, we determined an optimum thickness of porous material leading to the highest performance evaluation criterion. In our current study with the aspect ratio being the porous strip thickness over the channel width, an aspect ratio of 0.2 is found to be the alternative. A 40% increase in heat enhancement is detected in the presence of porous strip when compared to a clear channel case for a Reynolds number equal to 200 and improve further as the Reynolds number increase accordingly.

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Section: Problem Descriptionsmentioning

confidence: 99%

Section: Comparison With Experimental Datamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Approach of Heat Rate Enhancement in a Rectangular Channels with Thin Porous Layer at the Channel Walls

Saghir¹

2021

Preprint

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“…Saghir research team [21][22][23][24][25][26][27][28][29][30][31][32] have experimentally and numerically investigated the forced convection of Al2O3-Cu hybrid nanofluid, Al2O3/water nanofluid in porous media at different flow rates and heating conditions in a straight channel. Results revealed that fluid such as water with metallic nanoparticle can enhance the heat extraction by no more than 6% when compared to water circulation.…”

Section: Introductionmentioning

confidence: 99%

Forced Convection in Wavy Microchannels Porous Media Using TiO2 and Al2O3–Cu Nanoparticles in Water Base Fluids: Numerical Results

Elsafy

Saghir

2021

Micromachines

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In the present work, an attempt is made to investigate the performance of three fluids with forced convection in a wavy channel. The fluids are water, a nanofluid of 1% TiO2 in a water solution and a hybrid fluid which consists of 1% Al2O3-Cu nanoparticles in a water solution. The wavy channel has a porous insert with a permeability of 10 PPI, 20 PPI and 40 PPI, respectively. Since Reynolds number is less than 1000, the flow is assumed laminar, Newtonian and steady state. Results revealed that wavy channel provides a better heat enhancement than a straight channel of the same dimension. Porous material increases heat extraction at the expenses of the pressure drop. The nanofluid of 1% TiO2 in water provided the highest performance evaluation criteria.

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“…Experimental and numerical analysis of heat transfer enhancement in porous and clear channels has received a lot of attention lately. Researchers [1][2][3][4][5][6][7][8][9][10] focused on conducting heat and fluid flow in porous channels with different types of permeability at a constant porosity of 0.9. Such an approach proved to be effective in heat removal but at the expense of large pressure drops.…”

Section: Introductionmentioning

confidence: 99%

Optimum Multi-Mini-Channels Height for Heat Enhancement under Forced Convection Condition

Saghir

Al-Hajaj

2021

Energies

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Heat enhancement and heat removal remain important topics in engineering. Furthermore, flow in a laminar regime can reduce the cost of cooling. In the present study, flow in mini channels in a rectangular cavity is investigated with water as a circulating fluid. The height of the channel in the cavity is varied and interaction of the free flow above the channel with flow through the channel has been investigated. It is shown that a combination of these two flows can provide the optimum heat removal at a Reynolds number of 750. This finding is valid if one ignores the friction effect to the wall. The best configuration is for an aspect ratio AR = 6. If the pressure drop is taken into consideration, then the performance evaluation criterion shows that the mini-channel with aspect ratio AR = 12 is the best configuration. Different correlations have been obtained between the Nusselt number, pressure drop, friction factor, performance evaluation criterion, and the Reynolds number and the height of the channels.

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Heat Enhancement Using Aluminum Metal Foam: Experimental and Numerical Approach

Cited by 11 publications

References 0 publications

Novel Approach of Heat Rate Enhancement in a Rectangular Channels with Thin Porous Layer at the Channel Walls

Novel Approach of Heat Rate Enhancement in a Rectangular Channels with Thin Porous Layer at the Channel Walls

Forced Convection in Wavy Microchannels Porous Media Using TiO2 and Al2O3–Cu Nanoparticles in Water Base Fluids: Numerical Results

Optimum Multi-Mini-Channels Height for Heat Enhancement under Forced Convection Condition

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