Article

The Theory of Corrections of Capillary Viscometer

January 1985
Transactions of the Society of Instrument and Control Engineers 21(12):1295-1301

DOI:10.9746/sicetr1965.21.1295

Authors:

The velocity distribution at the inlet of a capillary viscometer is determined by the flow before the viscometer. Therefore, this flow is considered to affect the measurements of viscosity by the capillary viscometer. By the theoretical considerations applying Bernoulli's theorem and Newton's law of motion to the flow, the effect is indicated as πa²Δp and let MA be the momentum flowrate at the inlet of the capillary tube, it is known as MA>πa²Δp>1/2MA.

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