rolling ball viscometer
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2005 ◽  
Vol 50 (3) ◽  
pp. 849-855 ◽  
Author(s):  
Alfonso S. Pensado ◽  
María J. P. Comuñas ◽  
Luis Lugo ◽  
Josefa Fernández

1995 ◽  
Vol 50 (2-3) ◽  
pp. 316-322 ◽  
Author(s):  
Yukihiro Yoshimura ◽  
Seiji Sawamura ◽  
Yoshihiro Taniguchi

Abstract The viscosity of aqueous ammonium bromide solutions is measured at 0.1-1.0 mol kg-1, 278.2-323.2 K, and 0.1-375 MPa, using a high-pressure rolling-ball viscometer. The activation energy (Ev) for viscous flow and Jones-Dole's B coefficient are estimated. Ev against pressure yields a concave curve with a minimum and B yields a convex one with a maximum. These phenomena are attributed to pressure, temperature, and concentration effects on the water-structure.


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