Converging Slit Viscometer
For highly viscous liquids that slip in tube flow viscometers, we may sometimes use a converging flow to prevent slip. In this work, we attack the constant flow rate flow of a highly viscous Newtonian fluid through a converging slit with no slip boundaries using the equation of motion in terms of the stress. This work deepens our understanding of a controlled flow rate flow through a converging slit of arbitrary convergence angle by examining the slit in cylindrical coordinates. Worked examples for the calculation of viscosity from a converging slit viscometer are also included.
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