The dynamics of droplet impact on a heated porous surface.pdf (1.71 MB)
The dynamics of droplet impact on a heated porous surface
journal contributionposted on 2018-06-29, 08:32 authored by Peng Zhao, Graham HargraveGraham Hargrave, Hendrik 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.
- Mechanical, Electrical and Manufacturing Engineering
Published inChemical Engineering Science
Pages232 - 247 (16)
CitationZHAO, P. ...et al., 2018. The dynamics of droplet impact on a heated porous surface. Chemical Engineering Science, 190, pp. 232-247.
- AM (Accepted Manuscript)
Publisher statementThis 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/
NotesThis 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