| Other Abstract | With the integration and miniaturization of electronic components, the effective
heat-dissipation area decreases gradually, while the local heat flux is increasing,
which has an adverse effect on their performance and service life. Evaporative
cooling has excellent cooling effect, making it one of the promising technology to
enhance heat dissipation of next generation electronic components. Thermocapillary
convection induced by temperature gradient exist in many evaporative cooling
devices, such as heat pipes, capillary pumped loop, and it is an important factor
affecting the performance of all the micro heat exchange equipment. Evaporation
In this paper, evaporative liquid layers are chosen to be the research object of our
experiments to explore the coupling mechanism of evaporation and thermocapillary
convection.
Volatile working fluid is chosen to observe the thermocapillary convection in
a rectangle liquid layer subjected to a horizontal temperature gradient. The technique
we used are infrared imaging system and laser co-focal displacement meter.
Infrared imaging system are used to measure the temperature distribution of the
evaporation interface. And Laser co-focal displacement meter are used to observe
the interface position. Finally, we give the relationship of the average evaporation
rate and the imposed temperature gradient. Also, we give the interfacial
temperature distribution and flow field evolvement during different flow patterns.
As a new generation of heat transfer fluid, nanofluids are liquids(water, oils,
alcohol etc.) with stable suspensions of nanometer sized nanoparticles. Compared
with pure working liquids, the effect of nanoparticles on the transient evaporation
rate and interfacial temperature distribution are explored. |
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