Unsteady Flow in Circular Tube : Velocity Distribution of Pulsating Flow

Abstract

Oscillatory and pulsating flows through a rigid, circular tube are experimentally analyzed in the region of fully developed laminar flow. Transitions of the velocity distribution with respect to time are measured by a flow-visualization method. Aluminium powder is suspended in the fluid for the measurement, and many particle tracks (path lines) are photographed for a certain period of time. The velocity distribution is obtained by measuring the length of path lines. The experimental data are compared with the results of theoretical analysis, the validity of which is thus ascertained.