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Développement et étude d'un viscosimètre absolu à chute de bille

Abstract : 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. An experimental bench was developed in order to reach a relative uncertainty of the order of 10-3. The bench allows 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. The metrological characterization of this experimental bench is first performed using the law of propagation of uncertainties and then by a numerical Monte Carlo simulation. Finally, the viscosity measurements and uncertainties obtained by the falling ball viscometer are compared with those obtained by a capillary viscometer.
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Contributor : Matthieu Brizard <>
Submitted on : Friday, June 10, 2005 - 4:52:54 PM
Last modification on : Thursday, February 2, 2017 - 11:30:39 AM
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  • HAL Id : tel-00009440, version 1




Matthieu Brizard. Développement et étude d'un viscosimètre absolu à chute de bille. Mécanique []. Université Joseph-Fourier - Grenoble I, 2005. Français. ⟨tel-00009440⟩



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