Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 14 of 14 for “"Metal Foam"”.
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Investigation of heat transfer in metal-foam tubes
Nowadays metallic foams attract increasing attention in making compact heat exchangers due to its advanced thermal properties. In this project, the performance of forced convection and flow boiling heat transfer in metal-foam tubes has been investigated experimentally and theoretically. Compared to …
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Thermo-Hydraulic Performance of Partially Blocked Metal-Foam Channels
… proposed to meet these demands, high-porosity metal foams have attracted the attention of many investigators due to their higher surface area densities as well as higher thermal performance due to the turbulence and tortuosity generated in the flow due to their structure. One of the …
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Achieving high efficiency thermoelectric heating and cooling with metal foam heat exchangers
… system using thermoelectric (TE) and reticulated metal foam (RMF) technologies to power a vehicle`s battery thermal management system. The focus is split into two areas: first a review of TE’s sourcing or removing heat, second an examination of compact heat exchanger (HX) design. Five TE suppliers …
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Metal-foam interface stability during the filling of lost foam moulds with aluminium alloys
Aluminium Lost Foam castings were made using gravity and counter-gravity filling techniques. Tensile strength was found to be most uniform in those castings which had been filled slowly from the bottom and where the metal front had remained stable throughout filling sequence. Pores containing …
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A geometric study of liquid retention in open-cell metal foams
Open-cell metal foams show promise as an emerging novel material for heat exchanger applications. The high surface-area-to-volume ratio suggests increased compactness and decrease in weight of heat exchanger designs. However, the metal foam structure appears conducive to condensate retention, which …
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ENHANCEMENT OF PHASE CHANGE MATERIAL (PCM) THERMAL ENERGY STORAGE IN TRIPLEX-TUBE SYSTEMS
… of solid nanoparticles, (ii) incorporation of metal foam with nanoparticle dispersion, and (iii) insertion of longitudinal fins with nanoparticle dispersion. Validated simulation models were developed to examine the effects of implementing these techniques on the PCM phase-change rate during …
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Fabrication of 316L stainless steel (SS316L) foam via powder compaction method
Metal foam is the cellular structures that made from metal and have pores in their structures. Metal foam also known as the porous metals, which express that the structure has a large volume of porosities with the value of up to 0.98 or 0.99. Porous 316L stainless steel was fabricated by powder …
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Metal foams as novel materials for air-cooling heat exchangers
High-porosity metal foams have thermal, mechanical, electrical, and acoustic properties making them attractive for various engineering applications. Due to their large surface-area-to-volume ratio, tortuous flow path, and relatively high thermal conductivity they are being considered for a range of …
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Design & development of innovative proton exchange membrane fuel cells
… a novel application of open pore cellular metal foam as a flow plate material is proposed in this thesis. A model is developed, to simulate this relatively new material and extensive pressure analysis and flow modelling has been completed using this model. Computational fluid dynamic …
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The mechanisms of mold filling and casting defect formation in the lost foam casting process
… a better understanding of the mechanism by which foam patterns are decomposed and their decomposition products are transported through the refractory coating in the lost foam casting process. These tests have led to a refinement of current physical models for mold filling and provide additional …
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Syngas production using a catalytic engine
… the use and effects of a catalyst deposited on metallic foams placed in a one-cylinder compression-ignition engine, operating either in partial oxidation mode in combination with dry reforming. The metallic foam is attached to the bowl in the piston to carry out the chemical reaction. We …
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Convection and Flow Boiling in Microgaps and Porous Foam Coolers
An open and foam-filled microgap cooler, providing direct liquid cooling for a simulated electronic/photonic component and which eliminates the problematic thermal resistance of the commonly-used thermal interface material (TIM), is examined. The single phase heat transfer and pressure drop results …