Enhanced nucleate boiling on horizontal hydrophobic-hydrophilic carbon nanotube coatings
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Subcooled Pool Boiling Experiments on Horizontal Heaters Coated With Carbon Nanotubes
Pool boiling experiments were conducted with three horizontal, flat, silicon surfaces, two of which were coated with vertically aligned multiwalled carbon nanotubes (MWCNTs). The two wafers were coated with MWCNT of two different thicknesses: 9 m (Type-A) and 25 m (Type-B). Experiments were conducted for the nucleate boiling and film boiling regimes for saturated and subcooled conditions with l...
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Molecular dynamics (MD) simulations were employed to investigate the effect of wettability (via contact angle variation) on nanoscale pool boiling heat transfer of a liquid argon thin film on a horizontal copper substrate topped with cubic nano-pillars. The liquid-solid potential was incrementally altered in order to vary the contact angle between hydrophilic (θ~63°) and super hydrophobic (θ~15...
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We have taken advantage of the native surface roughness and the iron content of AISI 316 stainless steel to directly grow multi-walled carbon nanotube (MWCNT) random networks by chemical vapor deposition (CVD) at low-temperature (1000°C) without the addition of any external catalysts or time-consuming pre-treatments. In this way, super-hydrophobic MWCNT films on stainless steel sheets were obta...
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Owing to their high intrinsic thermal conductivity, carbon nanotubes (CNTs) have previously been incorporated into a variety of thermal management applications to improve cooling performance. Implementation of controlled CNT growth techniques and functionalization methods are applied herein to enhance boiling heat transfer from the porous capillary wicking surfaces widely used in high heat flux...
متن کاملof Heat Transfer Technical Brief ool Boiling Experiments on ultiwalled Carbon Nanotube
n this study, two silicon wafer substrates were coated with vertially aligned multiwalled carbon nanotubes (MWCNT) “forests” nd were used for pool boiling studies. The MWCNT forests (9 nd 25 m in height) were synthesized on the silicon wafer subtrates using chemical vapor deposition (CVD) process. The subtrates were clamped on a cylindrical copper block with embeded cartridge heaters. The heat ...
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تاریخ انتشار 2014