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Ring-shaped structure in free surface flow of non-Newtonian liquids

DSpace at IIT Bombay

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Title Ring-shaped structure in free surface flow of non-Newtonian liquids
 
Creator PARMAR, NH
TIRUMKUDULU, MS
 
Subject non-newtonian fluids
rotational flow
shear flow
 
Description We report the formation of a ringlike structure in the flow of particular non-Newtonian liquids coating a rotating vertical disk. Experiments were performed with a known volume of the liquid and at varying rotation rates such that the inertial effects were negligible. The liquid injected on the rotating disk initially coats the surface uniformly, which then redistributes itself such that at steady state a significant amount collected into a circular ring, off center with the axis of rotation. Beyond a critical rotation speed and for a given liquid volume, the ring formation did not occur. The ring formation was not observed in the case of Newtonian liquids. Rheological measurements along with the shear rate calculations suggest that the shear thinning nature of the liquids could be responsible for the observed ring formation.
 
Publisher AMER PHYSICAL SOC
 
Date 2011-07-16T23:37:06Z
2011-12-26T12:50:00Z
2011-12-27T05:35:55Z
2011-07-16T23:37:06Z
2011-12-26T12:50:00Z
2011-12-27T05:35:55Z
2009
 
Type Article
 
Identifier PHYSICAL REVIEW E, 80(3), -
1539-3755
http://dx.doi.org/10.1103/PhysRevE.80.036303
http://dspace.library.iitb.ac.in/xmlui/handle/10054/4561
http://hdl.handle.net/10054/4561
 
Language en