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Nucleate pool boiling heat transfer of ferrofluid on a horizontal plate; has been explored numerically. Extra necessary equations have been used in this model to simulate mass transfer and effect of magnetic field that had not considered in previous researches using mixture model. Also effect of negative and positive gradient of magnetic field on the heat transfer rate and bubble shape has been investigated. Results are in good agreement with experimental data.  相似文献
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The atomic behavior of liquid-solid mixed-phase nanofluid flows inside nanochannels is investigated by a molecular dynamics simulation (MDS). The results of visual observation and statistic analysis show that when the nanoparticles reach near each other, the strong interatomic force will make them attach together. This aggrega- tion continues until all nanoparticles make a continuous cluster. The effect of altering the external force magnitude causes changes in the agglomeration rate and system enthalpy. The density and velocity profiles are shown for two systems, i.e., argon (Ar)-copper (Cu) nanofluid and simple Ar fluid between two Cu walls. The results show that using nanopar- ticles changes the base fluid particles ordering along the nanochannel and increases the velocity. Moreover, using nanoparticles in simple fluids can increase the slip length and push the near-wall fluid particles into the main flow in the middle of the nanochannel.  相似文献
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