ISSN:
1089-7623
Source:
AIP Digital Archive
Topics:
Physics
,
Electrical Engineering, Measurement and Control Technology
Notes:
The locus of a fine spherical particle in a slowly rotating column filled with liquid is investigated in detail with a fundamental equation of motion, and a method for measurements of viscosity η and density ρ' of the liquid is proposed. With a particle having the radius a=10−3–10−2 cm from the restriction Re(approximately-less-than)1, (Re, Reynolds number) and the density ρ within 1.5ρ'(approximately-less-than)ρ〈4ρ' in a column rotating at the angular velocity ω0 within 1.5(approximately-less-than)Aω0/V0〈2, the particle locus becomes almost a circle with a diameter D that sensitively correlates with η and ρ' to be measured, where A=A0−a (A0, column radius) and V0 is the speed at free fall. For one particle (a one-particle system), η is universally measurable for almost any kind of liquid with a known ρ'. A two-particle system is also proposed for the continuous measurement of both η and ρ', and would be applied, for example, at varying temperatures or in the course of a chemical reaction.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.1139759
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