Abstract
We discuss first the valid time interval of a formula found in the literature which gives the theoretical distance run by a liquid which rises along a capillary tube as a function of time. A non-linear least square fitting of experimental data to this theoretical curve allows the measurement of the kinematic viscosity of the liquid. The goodness of the fitting for three different sets of experimental data given in the literature is above 99%.
Highlights
The rise rate of a liquid in a capillary tube depends on its viscosity
The familiar laboratory experiments involving the rise of liquids in capillary tubes ignores this fact and the attention is focused on the stationary regime
Despite it is described in the literature a very simple method for the experimental determination of the kinematic viscosity using a capillary tube [1], this method does not take into account the effect of surface tension and does not give a statistical procedure for the determination of the experimental error
Summary
The familiar laboratory experiments involving the rise of liquids in capillary tubes ignores this fact and the attention is focused on the stationary regime Despite it is described in the literature a very simple method for the experimental determination of the kinematic viscosity using a capillary tube [1], this method does not take into account the effect of surface tension and does not give a statistical procedure for the determination of the experimental error. Other classical experimental setups for the determination of the kinematic viscosity are principally based on the liquid motion into a capillary [3], or the friction that exerts a liquid over a rotating cylinder [4] All these classical methods assume implicitly a stationary regime in the motion of the liquid, but there is a lack of discussion over this point. The goodness of the non-linear fitting for three different sets of experimental data given in the literature is above 99%
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
