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Related Concept Videos

Uniform Depth Channel Flow01:27

Uniform Depth Channel Flow

Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...

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Related Experiment Video

Updated: Jun 30, 2026

Determining 3D Flow Fields via Multi-camera Light Field Imaging
14:25

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Published on: March 6, 2013

Quantitative three-dimensional optical tomographic imaging of supersonic flows.

G W Faris, R L Byer

    Science (New York, N.Y.)
    |December 18, 1987
    PubMed
    Summary

    Three-dimensional imaging visualizes nitrogen density in supersonic expansions. This technique uses beam-deflection optical tomography for high-accuracy, high-resolution density mapping.

    Area of Science:

    • Fluid Dynamics
    • Optical Physics
    • Aerospace Engineering

    Background:

    • Supersonic expansions are crucial in various scientific and engineering fields.
    • Accurate measurement of gas density is essential for understanding these flows.
    • Existing imaging techniques may have limitations in accuracy or resolution.

    Purpose of the Study:

    • To develop and demonstrate a novel method for three-dimensional imaging of nitrogen density.
    • To achieve high absolute accuracy, spatial resolution, and dynamic range in density measurements.
    • To utilize a simple apparatus for practical implementation.

    Main Methods:

    • Employed beam-deflection optical tomography.
    • Utilized a supersonic expansion of nitrogen from a nozzle.

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    14:25

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    Published on: March 6, 2013

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    11:59

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  • Developed a simplified optical setup for beam deflection measurements.

    • Main Results:

    • Successfully obtained three-dimensional images of nitrogen density.
    • Achieved high absolute accuracy in the density measurements.
    • Demonstrated high spatial resolution and a wide dynamic range in the imaging.

    Conclusions:

    • Beam-deflection optical tomography offers a viable and effective method for 3D density imaging.
    • The developed simple apparatus provides accurate and high-resolution data for supersonic flows.
    • This technique has potential applications in aerospace and fundamental fluid dynamics research.