On The Lifetime Of Non-Coalescent Levitated Droplets

Abstract

It is shown that a droplet will levitate over the liquid surface for 50-700 ms when released from a critical height 1.5-4 times the droplet diameter. While releasing a droplet out of this range will lead to direct submersion. Additionally, it is shown that by applying a temperature difference between the liquid pool and droplet it is possible to elongate the levitation time of that droplet as it pulls the surrounding air molecules between the drop and the pool surface. Lastly, the thickness of the air gap is calculated theoretically for a range of temperatures and compared with experiments. Surprisingly, larger temperature difference between droplet and surface causes an increase in the thickness of the air gap. It is also found that the size of droplet and type of fluid can significantly affect the lifetime of non-coalescent drops.

Publication Date

1-1-2015

Publication Title

ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2015, collocated with the ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1115/ICNMM2015-48826

Socpus ID

84980010232 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84980010232

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