Averaged fluid velocities near a cylinder in turbulent flow in an open channel: Experiment

A. V. Chebotnikov

Lavrent’ev Institute of Hydrodynamics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: The results of experiments in which a circular cylinder located near the bottom of a rectangular channel was exposed to transverse statistically stationary turbulent subcritical flow with free surface are presented. The particle image velocimetry (PIV) was used to obtain data on the averaged velocity field near the cylinder. The gradients of the longitudinal velocity component were used to determine the shear stresses on the bottom of the channel. It is shown that the presence of the cylinder in the flow causes considerable averaged vertical velocities and a significant change in the shear stresses on the bottom of the channel.

Keywords: free-surface flow, velocity field, round cylinder, experiment, PIV method.

UDC: 532.57:621.64

Received: 28.03.2012

 English version: Journal of Applied Mechanics and Technical Physics, 2012, 53:6, 846–853

Bibliographic databases:

•