Hydrothermal waves in droplet evaporation

Zhong, X.; Ho, A.; Duan, F.

dc.contributor.author	Zhong, X.
dc.contributor.author	Ho, A.
dc.contributor.author	Duan, F.
dc.date.accessioned	2016-07-18T10:50:12Z
dc.date.available	2016-07-18T10:50:12Z
dc.date.issued	2015
dc.description.abstract	Papers presented to the 11th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, South Africa, 20-23 July 2015.	en_ZA
dc.description.abstract	The hydrothermal waves (HTWs) have been investigated on the evaporation of ethanol, novec-7100 and pure water sessile droplets forming at the top of a cone-shaped container under the steady state. For ethanol and novec-7100, the temperature along the droplet diameter is higher near the triple line than in the middle section, within which the temperature shows slight oscillations representing instability of the thermal motion. Behaving inversely, the temperature of the water droplet is higher in the middle section than at the periphery, and no evident oscillation is observed. The results show that with the increase of the imposed voltage, the thermal motion is more rapid and the number of HTWs is increased in ethanol and novec-7100. The relation between the number of HTWs and the imposed voltage is fitted by an empirical equation for novec- 7100. With analysis of the origin of HTWs, the droplets evaporation belongs to the category of HTWs type 1 with gravity prevails over the surface tension.	en_ZA
dc.description.librarian	am2016	en_ZA
dc.format.medium	PDF	en_ZA
dc.identifier.citation	Zhong, X, Ho, A & Duan, F 2015, 'Hydrothermal waves in droplet evaporation', Paper presented to the 11th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 20-23 July 2015.	en_ZA
dc.identifier.isbn	97817759206873
dc.identifier.uri	http://hdl.handle.net/2263/55885
dc.language.iso	en	en_ZA
dc.publisher	International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics	en_ZA
dc.rights	© 2015 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.	en_ZA
dc.subject	HTWs	en_ZA
dc.subject	Droplets	en_ZA
dc.subject	Empirical equation	en_ZA
dc.subject	Temperature	en_ZA
dc.title	Hydrothermal waves in droplet evaporation	en_ZA
dc.type	Presentation	en_ZA