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Citation: Shao Yuefang, Diao Beibei, Cheng Rongshi*. THE KINETIC ENERGY AND DRAINAGE CORRECTIONS IN CAPILLARY VISCOSIMETRY[J]. Acta Physico-Chimica Sinica, ;1986, 2(04): 350-355. doi: 10.3866/PKU.WHXB19860414 shu

THE KINETIC ENERGY AND DRAINAGE CORRECTIONS IN CAPILLARY VISCOSIMETRY

1.
Department of Chemistry, Nanjing University

Received Date: 10 December 1985
Available Online: 15 August 1986

The kinetic energy loss and drainage effect of glass capillary viscometer are treated theoretically. These two correction factors interrelate closely and can not be separated with each other. The representative equation of glass capillary viscometer for measuring liquid viscosity may be written as
η/ρt=A~*-(B~*/t~2)-(C~*/t~4)
in which A*, B* and C* are instrumental constants. The numerical factor m of the kinetic energy correction term in the Poiseuille-Hagenbach equation is raised from the effect of adhering of liquids on the wall of the viscometer and may be represented by
m=1+(C~*/B~*t~2)
Therefore, the fact of ascending m with increasing Reynold number will be explained. Equations for calculating the relative viscosity of polymer solution and method for determining the instrumental constants are given.
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