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Related Experiment Video

Updated: Jun 15, 2026

Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows
07:53

Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows

Published on: April 25, 2013

Multiple-beam laser velocimeter: analysis and applications.

M E McDonnell, E J Johnson

    Applied Optics
    |March 18, 2010
    PubMed
    Summary
    This summary is machine-generated.

    Multiple-beam laser velocimetry offers clearer particle velocity measurements than traditional methods. This technique reduces ambiguity in analyzing systems with varying particle speeds, as demonstrated in fluidized beds.

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    Related Experiment Videos

    Last Updated: Jun 15, 2026

    Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows
    07:53

    Micro-particle Image Velocimetry for Velocity Profile Measurements of Micro Blood Flows

    Published on: April 25, 2013

    High-speed Particle Image Velocimetry Near Surfaces
    11:59

    High-speed Particle Image Velocimetry Near Surfaces

    Published on: June 24, 2013

    Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
    10:53

    Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

    Published on: March 12, 2019

    Area of Science:

    • Fluid dynamics
    • Optical measurement techniques
    • Particle imaging velocimetry

    Background:

    • Conventional two-beam laser velocimetry can lead to ambiguous interpretations in systems with distributed particle velocities.
    • Accurate measurement of particle velocity distributions is crucial in various industrial and scientific applications, including fluidized beds.

    Purpose of the Study:

    • To introduce and validate a multiple-beam laser velocimeter for enhanced particle velocity measurements.
    • To reduce ambiguity in interpreting data from systems with a distribution of particle velocities.

    Main Methods:

    • Theoretical calculation of the correlation function for particles traversing a multiple-beam laser intensity pattern.
    • Experimental verification of the calculated correlation function.
    • Application of the multiple-beam laser velocimeter to measure particle velocity distribution in a fast fluidized bed.

    Main Results:

    • The multiple-beam laser velocimeter generates sharp, well-defined intensity spots, improving measurement precision.
    • Theoretical predictions of the correlation function were experimentally validated.
    • The technique successfully measured the velocity distribution of particles in a fast fluidized bed with reduced ambiguity.

    Conclusions:

    • Multiple-beam laser velocimetry provides a more precise and less ambiguous method for measuring particle velocity distributions compared to the two-beam model.
    • This advanced velocimetry technique is effective for characterizing complex flow phenomena, such as those in fast fluidized beds.