Gravity–capillary evaporation regimes in microgrooves

Zhang, Chengbin; Yu, Fawen; Li, Xuejie; Chen, Yongping

doi:10.1002/aic.16484

Cited by 54 publications

(21 citation statements)

References 26 publications

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“…Microscale heat transfer and fluid flow are widely present in micro-electromechanical systems [1], chip laboratories [2,3], biomedical testing [4], microelectronic chip cooling [5], fuel cells [6], microreactors, and other frontier scientific and technological fields [7,8]. e research in this field is of great importance at the scientific level for exploring the law of microscale heat and mass transfer.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Liquid Flow and Heat Transfer in Rough Microchannels

Zhang

Zhao

et al. 2019

Advances in Condensed Matter Physics

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Although roughness is negligible for laminar flow through tubes in classic fluid mechanics, the surface roughness may play an important role in microscale fluid flow due to the large ratio of surface area to volume. To further verify the influence of rough surfaces on microscale liquid flow and heat transfer, a performance test system of heat transfer and liquid flow was designed and built, and a series of experimental examinations are conducted, in which the microchannel material is stainless steel and the working medium is methanol. The results indicate that the surface roughness plays a significant role in the process of laminar flow and heat transfer in microchannels. In microchannels with roughness characteristics, the Poiseuille number of liquid laminar flow relies not only on the cross section shape of the rough microchannels but also on the Reynolds number of liquid flow. The Poiseuille number of liquid laminar flow in rough microchannels increases with increasing Reynolds number. In addition, the Nusselt number of liquid laminar heat transfer is related not only to the cross section shape of a rough microchannel but also to the Reynolds number of liquid flow, and the Nusselt number increases with increasing Reynolds number.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Liquid Flow and Heat Transfer in Rough Microchannels

Zhang

Zhao

et al. 2019

Advances in Condensed Matter Physics

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“…Latent heat storage through phase change materials is of great interest in a wide range of technical applications, including electronics cooling [1,2], microfluidics system [3], building energy conservation [4], biomedical engineering [5], space thermal control [6,7], solar energy utilization [8], and chemical process [9,10]. As a typical application, the ice storage technique stores cooling capacity through the solidification of water during the valley electricity demand period and releases the cooling capacity by melting the ice during the peak electricity demand period.…”

Section: Introductionmentioning

confidence: 99%

Enhancement Study of Ice Storage Performance in Circular Tank with Finned Tube

et al. 2019

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Combined experimental and numerical studies are conducted to study ice storage performance of an ice storage tank with finned tube. Axially arranged fins on the refrigerant tube are applied to enhance the solidification. The evolution of the solid–liquid interface and the variation of temperature of the typical position is examined. The effect of natural convection is discussed in detail. In addition, the effects of refrigerant temperature and initial water temperature on the ice storage performance are analyzed. The results indicate that the ice storage performance is enhanced by the metal fins remarkably. The defection of poor heat transfer after ice is formed can be solved by applying fins in ice storage devices. Natural convection leads to unnecessary mixing of water with different temperatures, lessening the cooling energy stored and acting as a disadvantage during solidification. Decreasing the refrigerant temperature and initial water temperature is beneficial for ice storage.

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“…While the low-Z gas is diffusing to the vacuum through the microcapillary fill tubes and the support tent, the low-Z gas flow lies in the continuum flow region, the slip flow region, the transition flow region, and the free-molecular flow region [18,19]. In particular, deviating from the macroscopic continuum, the gas flow in the transitional flow region and the free-molecular flow region manifests a rarefied effect [20,21]. The classical Navier-Stokes equation is not suitable to describe the gas flow in this condition.…”

Section: Introductionmentioning

confidence: 99%

Simulation of the Gas Filling and Evacuation Processes in an Inertial Confinement Fusion (ICF) Hohlraum

Zhou

et al. 2019

Processes

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In indirect inertial confinement fusion (ICF), the prediction of gas pressures and mass flow rates in the hohlraum is critical for fielding the hohlraum film and the support tent. To this end, it is desirable to understand the gas filling and evacuation process through the microcapillary fill tube and the support tent. In this work, a unified flow simulation of the filling and evacuation processes through the microcapillary fill tube and the support tent in an ICF hohlraum was conducted to study the gas pressure and mass flow rate in the hohlraum. The effects of the support tent size and the microcapillary fill tube size on the critical pressure variation and pressure difference across the hole on the support tent are examined. The results indicate that an increase in the diameter of the hole and the hole number leads to a smaller pressure difference across the hole on the support tent. If the diameter of the hole on the support tent is larger than 0.06 mm, the critical pressure variation rate is nearly independent of the diameter and the hole number. Increases in the diameter and decreases in the length of the microcapillary fill tube induce a larger critical pressure variation rate and pressure difference across the hole, which is conductive to fielding the hohlraum film.

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Gravity–capillary evaporation regimes in microgrooves

Cited by 54 publications

References 26 publications

Experimental Study on Liquid Flow and Heat Transfer in Rough Microchannels

Experimental Study on Liquid Flow and Heat Transfer in Rough Microchannels

Enhancement Study of Ice Storage Performance in Circular Tank with Finned Tube

Simulation of the Gas Filling and Evacuation Processes in an Inertial Confinement Fusion (ICF) Hohlraum

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