A comparative study of the PIV and LDV measurements on a self-induced sloshing flow

Saga, Tsuneo; Hu, Hengshan; Kobayashi, Toshio; Murata, Shigeru; Okamoto, Koji; Nishio, S.

doi:10.1007/bf03182407

Cited by 32 publications

(12 citation statements)

References 6 publications

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“…Someya et al 6 and Saga et al 7 have studied a particular system where self-induced free-surface oscillations occurred. The liquid oscillations (which qualified as swell flapping) were the result of the interaction of a jet with the tank structure in the presence of a free surface.…”

Section: Introductionmentioning

confidence: 98%

Gravity oscillations applied in batch mixing

Noui‐Mehidi

Nguyen

2007

J of Chemical Tech & Biotech

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This paper discusses the benefits of using gravitational oscillations to achieve good mixing in relatively large vessels. An experimental study was performed on a semicircular-type tank equipped with a vertical central baffle plate. Liquid oscillations were generated by a rubber plate, placed on the bottom of the tank, which was divided into two separate chambers that were alternately inflated with controlled compressed air. For specific inflation periods, resonance yielding maximal amplitude was achieved in the two tank compartments. While flow visualization showed overall good mixing for different excitation frequencies, measurements of mixing times via a conductivity method revealed fast mixing for a particular frequency close to the natural frequency of an oscillating U-tube, and for which the maximal oscillation amplitude was recorded.  2007 Society of Chemical Industry Keywords: gravity oscillations; batch system; mild mixing; pulsated column; excitation frequency

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Section: Introductionmentioning

confidence: 98%

Gravity oscillations applied in batch mixing

Noui‐Mehidi

Nguyen

2007

J of Chemical Tech & Biotech

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“…This type of sloshing can be found in real-time applications such as liquid-oil carrier vehicles, space vehicles, and liquefied-natural-gas vessels in cargo ships. The fluid dynamic mechanism of the externally or selfinduced sloshing phenomenon should be understood clearly in order to attain an optimum safety design of the reactor vessels to prevent the occurrence of sloshing [2]. For example, in a liquidmetal fast-breeder reactor, the self-induced or externally induced sloshing of the high-temperature sodium coolant may occur in reactor vessels.…”

Section: Introductionmentioning

confidence: 99%

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

Eswaran

Singh

Saha

2011

Proceedings of the Institution of Mechanical Engineers, Part M:

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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.

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“…When using the optical instruments such as the LDV and PIV, the adjustment on the light beam or the piece of light sources could be arduous, and that demands keeping a good light transmission through the flow field, as well as seeding proper tracer particles in the flow field. The high price is another reason to limit the wide use of the LDV and PIV . So the traditional measurement technique, namely pressure probe technique, is necessary to be developed.…”

Section: Introductionmentioning

confidence: 99%

“…The high price is another reason to limit the wide use of the LDV and PIV. 5 So the traditional measurement technique, namely pressure probe technique, is necessary to be developed.…”

Section: Introductionmentioning

confidence: 99%

Study on Multihole Pressure Probe System Based on LabVIEW

2013

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The multihole pressure probes are widely used to determine flow velocity vectors and pressures in the fluid machinery fields due to their robustness, convenience, and economy in flow measurement. Accuracy and fast calibration of a multihole pressure probe is very important. In this article, a multihole pressure probe automatic calibration system is developed. The hardware device mainly consists of computer, motion control equipment and data acquisition (DAQ) equipment, and the software program is developed using the Glanguage based on LabVIEW platform. The fundamental theory and method of multihole pressure probes is reviewed, as well as about how to take into account the compressibility effect of the fluid. The developed system can be easily integrated by engineers in research institutes or industries, without requiring more expertise in programming or multihole probe measurement method. Furthermore, the system is used for a five-hole probe's calibration and measurement, satisfactory results are obtained. 0.5 • is the maximum uncertainty for the flow angles and 1.7% is for the velocity magnitude. The measurement biases being caused by the effect of Reynolds number are investigated. In the Reynolds number range of 1.06 × 10 4 to 4.29 × 10 4 , the measurement biases of velocity vector are presented.

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A comparative study of the PIV and LDV measurements on a self-induced sloshing flow

Cited by 32 publications

References 6 publications

Gravity oscillations applied in batch mixing

Gravity oscillations applied in batch mixing

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

Study on Multihole Pressure Probe System Based on LabVIEW

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