The working equations of a vibrating wire viscometer

A convenient set of working equations has been developed, together with their limits of validity, for the computation of the viscosity coefficient from the experimental data obtained with a vibrating wire viscometer. These equations are applicable for both a forced damped oscillation as well as a free damped oscillation. In the latter, non-stationary case a correction is incorporated in the equations which accounts for the corresponding difference in the fluid flow pattern.