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The dynamics of droplet impact on a heated porous surface

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journal contribution
posted on 29.06.2018, 08:32 authored by Peng Zhao, Graham Hargrave, Hendrik VersteegHendrik Versteeg, Colin GarnerColin Garner, Benjamin A. Reid, Edward LongEdward Long, Huayong ZhaoHuayong Zhao
In this paper, droplet impact on a porous surface is experimentally investigated over a wide range of Weber numbers and surface temperatures. Regime transition criteria have been deduced to determine droplet post-impingement behaviour as a function of the Weber number and surface temperature for which a droplet impacting on a porous surface. Based on the energy balance, an analytical model with improved boundary layer description is proposed to predict maximum spreading of droplet following impact on porous surfaces when the effect of heat transfer is negligible. The results of the model indicate that the spreading process after droplet impact on porous surfaces is governed by the viscous dissipation and matric potential. The maximum-spread model predictions agreed well with experimental measurements reported in this paper and the literature over a large range of Weber numbers and different porous surfaces.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Chemical Engineering Science

Volume

190

Pages

232 - 247 (16)

Citation

ZHAO, P. ...et al., 2018. The dynamics of droplet impact on a heated porous surface. Chemical Engineering Science, 190, pp. 232-247.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

12/06/2018

Publication date

2018-06-13

Notes

This paper was accepted for publication in the journal Chemical Engineering Science and the definitive published version is available at https://doi.org/10.1016/j.ces.2018.06.030

ISSN

0009-2509

eISSN

1873-4405

Language

en