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The plasma levitation of droplets

We show how to levitate a liquid droplet above a plasma. Submitting a conductive droplet to a voltage larger than 50 V, we get a levitation regime that looks like the one obtained with the well-known thermal Leidenfrost effect, except that light is emitted from beneath the droplet. Spectroscopic ana... Full description

Journal Title: Applied Physics Letters Aug 10, 2015, Vol.107(6)
Main Author: Poulain Cédric
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 0003-6951 ; E-ISSN: 1077-3118
Link: http://search.proquest.com/docview/2124104219/?pq-origsite=primo
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recordid: proquest2124104219
title: The plasma levitation of droplets
format: Article
creator:
  • Poulain Cédric
subjects:
  • Dense Plasmas
  • Plate Material
  • Levitation
  • Cathode Sputtering
  • Droplets
ispartof: Applied Physics Letters, Aug 10, 2015, Vol.107(6)
description: We show how to levitate a liquid droplet above a plasma. Submitting a conductive droplet to a voltage larger than 50 V, we get a levitation regime that looks like the one obtained with the well-known thermal Leidenfrost effect, except that light is emitted from beneath the droplet. Spectroscopic analysis shows that this light is emitted by a cold and dense plasma and also that lines coming from the cathode plate material are present revealing a local cathodic sputtering effect. We examine the conditions for the levitation to occur and show that the levitation is essentially of thermal origin. Assuming a stationary heat transfer, we present a model that accounts well for the observed levitation conditions. In particular, stable levitation is shown to be possible for thin cathode plates only.
language: eng
source:
identifier: ISSN: 0003-6951 ; E-ISSN: 1077-3118
fulltext: fulltext
issn:
  • 00036951
  • 0003-6951
  • 10773118
  • 1077-3118
url: Link


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subjectDense Plasmas ; Plate Material ; Levitation ; Cathode Sputtering ; Droplets
descriptionWe show how to levitate a liquid droplet above a plasma. Submitting a conductive droplet to a voltage larger than 50 V, we get a levitation regime that looks like the one obtained with the well-known thermal Leidenfrost effect, except that light is emitted from beneath the droplet. Spectroscopic analysis shows that this light is emitted by a cold and dense plasma and also that lines coming from the cathode plate material are present revealing a local cathodic sputtering effect. We examine the conditions for the levitation to occur and show that the levitation is essentially of thermal origin. Assuming a stationary heat transfer, we present a model that accounts well for the observed levitation conditions. In particular, stable levitation is shown to be possible for thin cathode plates only.
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abstractWe show how to levitate a liquid droplet above a plasma. Submitting a conductive droplet to a voltage larger than 50 V, we get a levitation regime that looks like the one obtained with the well-known thermal Leidenfrost effect, except that light is emitted from beneath the droplet. Spectroscopic analysis shows that this light is emitted by a cold and dense plasma and also that lines coming from the cathode plate material are present revealing a local cathodic sputtering effect. We examine the conditions for the levitation to occur and show that the levitation is essentially of thermal origin. Assuming a stationary heat transfer, we present a model that accounts well for the observed levitation conditions. In particular, stable levitation is shown to be possible for thin cathode plates only.
copMelville
pubAmerican Institute of Physics
urlhttp://search.proquest.com/docview/2124104219/
orcidid0000-0003-2779-3592
doi10.1063/1.4926964
date2015-08-10