Experimental study on the effect of surface conditions on evaporation of sprayed liquid droplet |
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| Authors: | El-Sayed R Negeed N Ishihara K Tagashira S Hidaka M Kohno Y Takata |
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| Affiliation: | 1. National Research Tomsk Polytechnic University, 30 Lenin Ave., Tomsk 634050, Russia;2. Kutateladze Institute of Thermophysics Siberian Branch, Russian Academy of Sciences, 1 Lavrentyev Ave., Novosibirsk 630090, Russia;1. School of Physics, University of Electronic Science and Technology of China, Chengdu 610054, China;2. School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China;3. Leibniz Institute of Polymer Research Dresden, Dresden 01069, Germany;4. Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China |
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| Abstract: | The present study investigates experimentally the effects of thermal properties of the hot surface and droplet characteristics on the droplet evaporation. Cylindrical blocks made of Stainless Steel, Aluminum and Brass with different degrees of surface roughness were used. The droplet diameter and velocity were controlled independently. The behavior of droplet during the collision with hot surface was observed with a high-speed camera. The results presented the effect of the thermal properties of the hot surface, droplet Weber number, droplet velocity, droplet size, hot surface conditions; surface superheat and degree of surface roughness on the solid–liquid contact time and the maximum spread of droplet over the surface. Empirical correlations have been deduced describing the relationship between the hydrodynamic characteristics of an individual droplet impinging on a heated surface and concealing the affecting parameters in such process. Also, the comparison between the current results and the results due to others investigators shows good agreement in which the difference between them ranged from 5% to 25%. |
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