Abstract
Laser-induced fluorescence (LIF) method was used to visualize and measure velocity profiles in pulsatile water flow through a 180°curved tube of square cross section. Visualization and quantitative mesurement of velocity profiles across the tube was made at eight different phases in one period of the pulsatile flow at five different cross sections along the curved tube. As a result, the instantaneous velocity field was clearly visualized and measured. Furthermore, stere, ographs of instantaneous velocity profiles and instantaneous contours of equi-velocity in a u-bend at θ=180° was obtained from the instantaneous velocity profiles in a pulsatile flow.
