The rapid formation of drops of viscous liquids

Autor:	G Manfré, R W Whorlow
Rok vydání:	1967
Předmět:	Surface tension Chemistry Drop (liquid) General Engineering Thermodynamics Viscous liquid Drop weight Body orifice
Zdroj:	British Journal of Applied Physics. 18:839-844
ISSN:	0508-3443
DOI:	10.1088/0508-3443/18/6/319
Popis:	Earlier dimensional analyses which established a relationship between the weight W0 of a very slowly formed (`static') drop and surface tension have been extended to rapidly formed drops of viscous liquids. ΔW/γR would be expected to be a function of R2ρg/γ and ηW/γ2 where ΔW is the increase over the `static' drop weight when the weight rate of flow is W from an orifice of external radius R. Here ρ, γ and η represent the density, surface tension and viscosity of the liquid. A further assumption leads to the conclusion that ΔW/W0 should be a function of ηW/γ2 only. These predictions are verified for a single orifice and less satisfactorily when the orifice size is varied. The results permit the application of the drop-weight method for measuring surface tension to viscous liquids for which the time taken to achieve a true `static' drop weight would be excessive.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::4da7182b6690d149a65da64795edeecb https://doi.org/10.1088/0508-3443/18/6/319 Zobrazit plný text záznamu