دانلود رایگان مقاله لاتین اثر کشش سطحی چوب در تاثیر چلپ چلوپ از سایت الزویر
عنوان فارسی مقاله:
اثر کشش سطحی و زبری سطح چوب در تاثیر چلپ چلوپ یک قطره آب خالص
عنوان انگلیسی مقاله:
Effects of surface tension and wood surface roughness on impact splash of a pure and multi-component water drop
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Liquid drop impact upon a surface is interesting in a variety of practical applications, such as thermal spray coating by depositing (or propelling) molten droplets onto a substrate, fire suppression by water mist/spray, spray cooling of hot surfaces by impinging liquid droplets, ink-jet printing, spray painting, etc. [1–7]. The fluid dynamical phenomena of liquid drop impact on solid surfaces include spreading, receding, rebounding and splashing [8,9]. The collision of drops impinging onto solid metallic surface, solid and liquid coexist surface, structured rough substrates with grooves, have been widely studied [10–15]. However, most of the above studies mainly focused on drop impact upon metallic surfaces, there is few study focused on drop impact upon wood surfaces, although it may be the key mechanism of an A-type (solid combustible material) fire suppression with water-based agents. Chen et al. [16] and Lan et al. [17] studied the water drop impact on wood surfaces, but they did not consider the effects of additives on water drop impaction. Water mist has been regarded as a better substitute of conventional means known as halon agents for fire suppression, and the fuel surface/flame cooling being considered as one of the dominant mechanisms [18–20]. There are two phenomenathat limit the efficiency of drop deposition from sprays: splashing and bouncing [21]. If the splashing and bouncing phenomena can be avoided or limited, the efficiency of fire suppression with water-based technologies may be well improved. Many studies had been done to improve the efficiency of the technologies by mixing additives into water [22–24]. Some of the results indicate that the efficiency of fire suppression with water mist or multi-component foam agents can be improved by adding additives with an optimized concentration, especially for wood crib fires. However, the reasons of such improvement and the interaction dynamics of a multi-component water drop impact upon wood surface are still not clear enough. Therefore, the impact process of a pure and multi-component water drop impinging upon different wood surfaces is conducted in this study.
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کلمات کلیدی:
PDF]Material Based Splashing of Water Drops - Semantic Scholar https://pdfs.semanticscholar.org/48b2/b19e40b84e40fae2e9a157e909ffd5ab4fa4.pdf by K Garg - Cited by 15 - Related articles These materials can be broadly classified as rough (e.g., wood and brick), smooth (e.g., ..... Other drop factors such as surface tension and density also affect. Images for surface tension and wood surface ... Image result for surface tension and wood surface roughness on impact splash Image result for surface tension and wood surface roughness on impact splash Image result for surface tension and wood surface roughness on impact splash Image result for surface tension and wood surface roughness on impact splash Image result for surface tension and wood surface roughness on impact splash More images for surface tension and wood surface roughness on impact splash Report images The Effects of Leaf Roughness, Surface Free Energy and Work of ... journals.plos.org/plosone/article?id=10.1371/journal.pone.0107062 by H Wang - 2014 - Cited by 17 - Related articles Sep 8, 2014 - These results indicated that leaf roughness, surface free energy, ... to modify the surface tension of the spray droplet, allowing it to adhere and spread on ...... the surface free energy of wood using contact angle measurements. [PDF]Between Bouncing and Splashing: Water Drops on a Solid Surface pub.bojand.org/bounce.pdf by B DURICKOVIC - 2005 - Cited by 12 - Related articles the surface tension, viscosity, and velocity of the drop at impact.1. Three types of ... efficiently: by using microscopically rough surfaces covered with a hydrophobic material, the ... Bouncing and splashing on super-hydrophobic surfaces. ... on the same microscope slide, which was positioned on two machine-planed wooden. Drop Impact upon Micro- and Nanostructured Superhydrophobic ... pubs.acs.org/doi/full/10.1021/la900330q by P Tsai - 2009 - Cited by 165 - Related articles Apr 20, 2009 - The balance between the surface tension and droplet gravitational .... splashing behaviors is due to the effect of surface roughness and not due ... [PDF]Impact of Picoliter Droplets on Superhydrophobic Surfaces with ... https://www.repository.cam.ac.uk/.../1810/.../110930_PBD%20Manuscript_Clean.pdf... by PS Brown - 2011 - Cited by 25 - Related articles Oct 6, 2011 - P. S. Brown, A. Berson, E. L. Talbot, T. J. Wood, W. C. E. Schofield, C. D. Bain, and J. P. S. Badyal ... velocity, viscosity, and density) and surface tension forces. ... Droplet impact onto rough superhydrophobic surfaces usually results in bouncing31,32 or splashing.33,34,35,36,37 The situation is further.
