Experimental measurement of the surface velocity field in an externally induced sloshing tank

Abstract

In this work, the unsteady free-surface velocities during the surge motion of a liquid tank are determined through experimental investigation. A new experimental approach has been discussed for capturing the free surface of the liquid during tank excitation. In order to avoid violent motion in the tank, the tank is excited with a low frequency (up to 47 per cent of the first-mode frequency) which leads to low-steepness waves in the container. When a container oscillates at a low excitation frequency, the wave amplitude A is usually small. Since the wave steepness E is directly proportional to the wave amplitude, the wave steepness is also small during the motion. The planar two-dimensional particle image velocimetry technique is used to calculate the U and V velocities of the free surface, while the interface location technique is used to determine the vertical velocity W of the interface. The velocities are measured for various liquid fill levels and excitation frequencies. The average line velocity V w near the tank wall and the average line velocity V c near the velocity tank centre with respect to time are estimated and compared with the tank velocity. The observed flow patterns indicate the presence of complicated flows during the sloshing experiment.

Equivalent mechanical models of sloshing fluid in arbitrary‐section aqueducts

“…This phenomenon is in accordance with the basic law of structural dynamics. Figure 4 presents a comparison of the theoretical and experimental values of o 2 1 l=g, in which the experimental results are from [21][22][23][24]. In Figure 4, it can be seen that the theoretical and experimental values are in very close agreement.…”

Non-Contact Water Level Response Measurement of a Tubular Level Gauge Using Image Signals

“…Liquid storage tanks must be fabricated using transparent materials to use PIV and PTV, which have been widely used to measure the water level responses of fluids. Inputting special particles in the tanks must be possible and the particles must be illuminated with a laser beam [24,25].…”

Identification of Ellis rheological law from free surface velocity

“…Several contributions have recently demonstrated that it is possible to measure the free surface velocity with the high resolution and capture rate that is typical of Particle Image Velocimetry (PIV), see Weitbrecht et al (2002); Meselhe et al (2004); Sokoray-Varga and Józsa (2008); Eswaran et al (2011) for hydraulics applications and Berger and Corrsin (1974);Heining et al (2012); Landel et al (2015) for liquid film applications.…”