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Related Concept Videos

Uniform Depth Channel Flow01:27

Uniform Depth Channel Flow

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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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To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...
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The force applied by fluids against a surface, known as hydrostatic pressure, initiates the transfer of fluid among different compartments. Within our blood vessels, the blood's hydrostatic pressure is a result of the heart's pumping action. At the arteriolar end of capillaries, hydrostatic pressure (capillary blood pressure) exceeds the opposing colloid osmotic pressure created primarily by plasma proteins like albumin. This discrepancy in pressure propels plasma and nutrients from the...
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Consider a control volume, such as a pipe with solid boundaries, through which fluid flows and changes direction due to the impulse exerted by the resulting force from the pipe walls. In steady flow, the mass of fluid entering the control volume at a given time, t, with velocity v1, is equal to the mass leaving after infinitesimal time dt, with velocity v2.
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Gradually Varying Flow01:29

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Gradually varying flow (GVF) in open channels describes situations where water depth changes slowly along the channel due to factors like non-uniform bed slope, channel shape variations, or obstructions. This flow type occurs when the depth adjusts gradually to balance gravitational forces, shear forces, and energy requirements, resulting in a low rate of depth change.Characteristics of Gradually Varying FlowGVF is commonly observed in natural streams, rivers, and canals, where flow depth...
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Related Experiment Video

Updated: Sep 23, 2025

Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
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Multi-Scale Flow-Based Occluding Effect and Content Separation for Cartoon Animations.

Cheng Xu, Wei Qu, Xuemiao Xu

    IEEE Transactions on Visualization and Computer Graphics
    |May 13, 2022
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces a novel method to separate visual effects from content in cartoon animations. The technique effectively isolates animated effects, improving content analysis and processing for cartoon videos.

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    Area of Science:

    • Computer Vision
    • Animation Analysis
    • Digital Image Processing

    Background:

    • Occluding effects in cartoon animations, like rain or leaves, enhance visual appeal but hinder content analysis.
    • Existing methods struggle with the large, stylized, and unpredictable motion of cartoon effects compared to realistic ones.

    Purpose of the Study:

    • To develop a method for separating occluding effects from content in cartoon animations.
    • To address the challenges posed by stylized, large-sized, and unpredictably moving cartoon effects.

    Main Methods:

    • Leveraging motion pattern differences between effects and content.
    • Utilizing a multi-scale flow-based effect prediction (MFEP) module to identify effect locations.
    • Employing a dual-task learning system for simultaneous effect extraction and content reconstruction.

    Main Results:

    • The proposed method significantly outperforms existing techniques in separating effects and content.
    • Demonstrated successful application on diverse cartoon videos with various effects.
    • Validated the utility of separated effects and content in downstream tasks.

    Conclusions:

    • The developed method effectively separates cartoon effects from content, overcoming challenges of stylized motion.
    • This separation facilitates advanced video analysis and processing applications.
    • The approach offers a significant advancement in cartoon animation processing.