Plasmonic gold nanoparticles self-assembled at the air-water interface to produce an evaporative surface with local control inspired by skins and plant leaves. Fast and efficient evaporation is realized due to the instant and localized plasmonic heating at the evaporative surface. The bio-inspired evaporation process provides an alternative promising approach for evaporation, and has potential applications in sterilization, distillation, and heat transfer.

Bio-Inspired Evaporation Through Plasmonic Film of Nanoparticles at the Air–Water Interface

A review of small heat pipes for electronics

Numerical study and optimizing on micro square pin-fin heat sink for electronic cooling

Electric power generation from solar pond using combined thermosyphon and thermoelectric modules

https://docs.lib.purdue.edu/cgi/viewcontent.cgi?article=1143&context=coolingpubs

A numerical model for transport in flat heat pipes considering wick microstructure effects

Numerical analysis and experimental verification on thermal fluid phenomena in a vapor chamber

A vapor chamber is used as a novel heat spreader to cool high-performance MPUs (microprocessor units). The vapor chamber is placed between small heat sources and a large heat sink. This paper describes the effect of heat source size on the heat transfer characteristics of the vapor chamber. First, by the experiments, the effect of heat source size on the temperature distribution of the vapor chamber is investigated, and the validity of the mathematical model of the vapor chamber is confirmed. Secondly, by the numerical analyses, the effect of heat source size on the thermal resistances inside the vapor chamber is discussed. It is found that the heat source size greatly affects the thermal resistance of the evaporator section inside the vapor chamber. Although the thermal resistance is hardly affected by the heat generation rate and the heat flux of the heat source, it increases as the heat source becomes smaller.

https://www.jstage.jst.go.jp/article/jsmeb/49/4/49_4_1233/_pdf

Fundamental experiments and numerical analyses on heat transfer characteristics of a vapor chamber : (Effect of Heat Source Size)

The aim of the present study is to disclose the thermal–fluid flow transport phenomenon of nanofluids in the heated horizontal circular tube. Consideration is given to the effects of volume fraction of the nanoparticle and Reynolds number on the turbulent heat transfer and pressure loss. It is found that (i) each viscosity, for three different nanofluids, increases with an increase in the volume fraction of nanofluid, (ii) the corresponding pressure loss increases slightly in comparison with that of pure water, and (iii) substantial heat transfer enhancement is caused by suspending nanoparticles, but its effect is attenuated by large particle aggregation.

Experimental study on convective thermal-fluid flow transport phenomena in circular tube using nanofluids

Numerical analyses on heat transfer characteristics of ultra-thin heat pipes: Fundamental studies with a three-dimensional thermal-fluid model

In order to comply with the recent demand for downsizing of the electric equipment, the minia- turization and the improvement in heat transfer performance of a heat sink under natural air-cooling are increasingly required. This paper describes the experimental and numerical investigations of heat sinks with miniature/micro pins and the effect of the pin size, pin height and the number of pins on heat transfer characteristics of heat sinks. Five types of basic heat sink models are investigated in this study. The whole heat transfer area of heat sinks having the different pin size, pin height and the number of pins respectively is kept constant. From a series of experiments and numerical analyses, it has been clarified that the heat sink temperature rises with increase in the number of pins. That is, the heat sink with miniaturized fine pins showed almost no effect on the heat transfer enhancement. This is because of the choking phenomenon occurred in the air space among the pin fins. Reflecting these results, it is confirmed that the heat transfer coefficient reduces with miniaturization of pins. Concerning the effects of the heat transfer area on the heat sink performance, almost the same tendency has been observed in other three series of large surface area, that is, higher pin height. Furthermore as a result of studying non-dimensional convection heat transfer performance, it was found that the relation between the Nusselt number (Nu) and the Rayleight number (Ra) is given by Nu = 0.16 Ra0.52.

/pdf/heat-transfer-characteristics-of-square-micro-pin-fins-under-azoddp1fpp.pdf

Yasushi Koito

Papers

Numerical analysis and experimental verification on thermal fluid phenomena in a vapor chamber

Fundamental experiments and numerical analyses on heat transfer characteristics of a vapor chamber : (Effect of Heat Source Size)

Experimental study on convective thermal-fluid flow transport phenomena in circular tube using nanofluids

Numerical analyses on heat transfer characteristics of ultra-thin heat pipes: Fundamental studies with a three-dimensional thermal-fluid model

Heat Transfer Characteristics of Square Micro Pin Fins under Natural Convection