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Asymmetric wicking and reduced evaporation time of droplets penetrating a thin double-layered porous material

Gat, Amir D. and Vahdani, Aria and Navaz, Homayun and Nowakowski, Albert and Gharib, Morteza (2013) Asymmetric wicking and reduced evaporation time of droplets penetrating a thin double-layered porous material. Applied Physics Letters, 103 (13). Art. No. 134104. ISSN 0003-6951.

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We study numerically and experimentally the penetration and evaporation dynamics of droplets wicking into a thin double-layered porous material with order-of-magnitude difference in the physical properties between the layers. We show that such double-layered porous materials can be used to create highly asymmetrical wicking properties, preventing liquid droplets wicking from one surface to the other, while allowing wicking in the reverse direction. In addition, these double-layered porous materials are shown to reduce the evaporation time of droplets penetrating into the porous material, compared with a single-layered porous material of equal thickness and physical properties similar to either of the layers.

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Additional Information:© 2013 AIP Publishing LLC. Received 24 July 2013; accepted 12 September 2013; published online 26 September 2013. This work was supported by the Defense Threat Reduction Agency (DTRA) and Cheryk Laboratory for Bioinspired Engineering at Caltech.
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Defense Threat Reduction Agency (DTRA)UNSPECIFIED
Caltech Cheryk Laboratory for Bioinspired EngineeringUNSPECIFIED
Issue or Number:13
Record Number:CaltechAUTHORS:20131101-075801419
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:42168
Deposited By: Tony Diaz
Deposited On:01 Nov 2013 17:36
Last Modified:03 Oct 2019 05:55

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