CXIV. Viscous flow through wide-angled cones

Summary Experiments are described on the flow of liquid with negligible kinetic energy through cones of very large angle, where peculiar results are to be expected owing to the velocity-gradient in the direction of motion and the corresponding forces due to viscosity. With converging flow through cones of semi-angle not greater than 90°, the velocities and reversal of radial pressure-gradient agree with the theory. For larger angles of cone a reversal of velocity is found, but not in the way predicted by the theory. One of the postulates is not satisfied, and the theory is therefore not applicable.