Abstract
Flow field near the front of an incompressible viscous fluid pushed into a circular pipe is analyzed theoretically and observed experimentally. In the theory, an approximated stream function for a steady state near the axis of the pipe is obtained by use of the Stokes equation. In the experiment, the shape of the surface was observed by a video camera. The theoretical velocity profile and the surface shape near the axis coincide with those from computation (Part I) and experiment.
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