Analysis of the finite cone‐plate viscometer and of the finite parallel‐plate viscometer

摘要

AbstractThe analyses for flow of a simple fluid of Noll both in the infinite cone‐plate viscometer and in the infinite parallel‐plate viscometer are shown to be consistent with the existence of a free surface in the finite instruments. Neglected in the description of the free surface are: the effect of any gradients in surface tension, the effect of the rate‐of‐deformation of the free surface upon the surface stress tensor, the effect of mass transfer at the free surface, inertial and gravitational effects in the free surface, and distortion of the free surface at solid bou