Abstract The relatively large sampling volume of acoustic Doppler velocimeters (ADVs) is expected to influence their measurement turbulence. To study this effect, a series experiments using different sizes was conducted in an axisymmetric turbulent jet. results show that the mean velocities are not significantly affected by size volume. On other hand, reducing increase variances u and ? velocit...

A physical model of gabion overflow dams was studied to determine the velocity profile and Reynolds shear stress. Physical tests were done under two different conditions of dam crest, overflow dams with impermeable and with permeable crests. Instantaneous velocity components over dam crest were measured by an ADV (Acoustic Doppler Velocimeter) instrument. This instrument is capable of measuring...