Global ETD Search
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Showing 1 to 7 of 7 for “"jumping droplets"”.
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Electrowetting study of jumping droplets on hydrophobic surfaces
Recent studies have shown that jumping-droplet-enhanced condensation has higher heat transfer than state-of-the-art dropwise condensing surfaces by -30-40%. Jumping-droplet condensation occurs due to the conversion of surface energy to kinetic energy during the coalescence of microscale droplets, …
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Electrostatic charging of jumping droplets on superhydrophobic nanostructured surfaces : fundamental study and applications
… when two or more small (~10-100 [mu]m) droplets coalesce on a superhydrophobic surface, they can spontaneously jump away from the surface due to the reduced droplet-surface adhesion and release of excess surface energy, which has been shown to increase heat transfer by 30 - 40% compared …
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Condensation heat flux measurements in ambient conditions on superhydrophobic nanostructured surfaces
… coatings have gathered attention with jumping droplets with the potential for self-cleaning applications and spot cooling on high powered applications. With new coatings being used on different materials, a need has developed for heat transfer measurements through these superhydrophobic …
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Liquid-vapor phase change phenomena for heat exchangers and electronics cooling
… power generation, and water desalination. Jumping-droplet condensation of water has recently been shown to have a 10X heat transfer enhancement compared to state-of-the-art filmwise condensation due to the removal of condensate at much smaller length scales (~ 1µm) than what is capable with …
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Developing an active, high-heat-flux thermal management strategy for power electronics via jumping-droplet phase-change cooling
… electronics via electric-field-enhanced (EFE) jumping-droplet condensation. To test the viability of EFE condensation for electronic hot spot cooling, an experimental setup was developed to remove heat via droplet evaporation from single and multiple high-power gallium nitride (GaN) transistors …
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Development and characterization of micro/nano structured surfaces for enhanced condensation
… behavior of both suspended and partially wetting droplets on the same surface during condensation was observed. Environmental scanning electron microscopy was used to demonstrate that initial droplet growth rates of partially wetting droplets were 6 times larger than that of suspended droplets. A …
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Heat transfer through a condensate droplet on hydrophobic and nanostructured superhydrophobic surfaces
… transfer by as much as 300% for dropwise and jumping-droplet condensation. To verify our simulation results, we study condensed water droplet growth using optical and ESEM microscopy on bi-philic samples consisting of hydrophobic and nanostructured superhydrophobic regions, showing excellent …