Design of a high precision falling-ball viscometer
- Laboratoire National d'Essais (BNM-LNE), 1 Rue Gaston Boissier, 75015 Paris Cedex 15 (France)
The increase in uncertainty throughout the viscosity scale being the principal disadvantage of capillary viscometry, an absolute falling-ball viscometer has been developed, making it possible to cover a wide range of viscosities while keeping a weak uncertainty. The measurement of viscosity of a liquid then rests on the terminal velocity measurement of a falling ball, corrected by the principal identified effects (edge effects, inertial effects, etc.). An experimental bench was developed in order to reach a relative uncertainty of the order of 10{sup -3} to the measure of viscosity. The bench, by the use of a linear camera, allows us to observe the trajectory and to obtain the variations in velocity of the ball inside a cylindrical tube filled with liquid whose viscosity is to be measured.
- OSTI ID:
- 20644108
- Journal Information:
- Review of Scientific Instruments, Vol. 76, Issue 2; Other Information: DOI: 10.1063/1.1851471; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
- Country of Publication:
- United States
- Language:
- English
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