The dynamics of droplet impact on a heated porous surface
| Autor: | Huayong Zhao, Graham K. Hargrave, Colin P. Garner, Peng Zhao, Benjamin A. Reid, Hendrik K. Versteeg, E. J. Long |
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| Rok vydání: | 2018 |
| Předmět: |
Surface (mathematics)
Range (particle radiation) Materials science Applied Mathematics General Chemical Engineering Dynamics (mechanics) Energy balance 02 engineering and technology General Chemistry Mechanics 021001 nanoscience & nanotechnology 01 natural sciences Industrial and Manufacturing Engineering 010305 fluids & plasmas Physics::Fluid Dynamics Boundary layer 0103 physical sciences Heat transfer Weber number 0210 nano-technology Porosity |
| Zdroj: | Chemical Engineering Science. 190:232-247 |
| ISSN: | 0009-2509 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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