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Title of Journal: Heat Mass Transfer

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Abbravation: Heat and Mass Transfer

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Springer-Verlag

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DOI

10.1016/1359-0197(89)90100-8

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1432-1181

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Molecular dynamics simulation of annular flow boil

Authors: D Toghraie Semiromi A R Azimian
Publish Date: 2011/07/14
Volume: 48, Issue: 1, Pages: 141-152
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Abstract

Molecular dynamics simulation of annular flow boiling in a nanochannel is numerically investigated In this research an annular flow model is developed to predict the superheated flow boiling heat transfer characteristics in a nanochannel To characterize the forced annular boiling flow in a nanochannel an external driving force overrightarrow F textext ranging from 1 to 12 PN PN = pico newton is applied along the flow direction to inlet fluid particles during the simulation Based on an annular flow model analysis it is found that saturation condition and superheat degree have great influences on the liquid–vapor interface Also the results show that due to the relatively strong influence of the surface tension in small channels the interface between the liquid film and the vapor core is fairly smooth and the mean velocity along the streamwise direction does not change anymore Also it is found that the heat flux values depend on the boundary conditions Finally the Green–Kubo formula is used to calculate the thermal conductivity of liquid Argon The simulations predict thermal conductivity of liquid Argon quite well

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