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関連する概念動画

Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

9.7K
Fluid dynamics is the study of fluids in motion. Velocity vectors are often used to illustrate fluid motion in applications like meteorology. For example, wind—the fluid motion of air in the atmosphere—can be represented by vectors indicating the speed and direction of the wind at any given point on a map. Another method for representing fluid motion is a streamline. A streamline represents the path of a small volume of fluid as it flows. When the flow pattern changes with time, the...
9.7K
Steady Flow of a Fluid Stream01:27

Steady Flow of a Fluid Stream

972
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.
During this process, the momentum of the fluid within the control volume remains constant over the time interval dt. By applying the...
972
Bernoulli's Equation for Flow Along a Streamline01:30

Bernoulli's Equation for Flow Along a Streamline

1.6K
Bernoulli's equation relates the energy conservation in a fluid moving along a streamline. The equation applies to incompressible and inviscid fluids under steady flow. For such a flow, Newton's second law is applied to a small fluid element, which experiences forces due to pressure differences, gravity, and velocity variations. The force balance leads to the following form of Bernoulli's equation:
1.6K
Streamlines, Streaklines, and Pathlines01:18

Streamlines, Streaklines, and Pathlines

1.9K
A streamline represents the trajectory that is always tangent to the fluid's velocity vector at any given point. The velocity of a fluid particle is always directed along the streamline, ensuring the particle continuously follows the streamline's path. Streamlines are particularly useful for visualizing the overall direction of flow in a fluid system, and they provide an instantaneous representation of the flow's velocity field. In steady flow, where conditions do not change over...
1.9K
Turbulent Flow01:24

Turbulent Flow

921
Turbulent flow is characterized by unpredictable fluctuations in velocity and pressure, which result in a chaotic fluid movement distinct from the orderly patterns of laminar flow. While laminar flow is governed by smooth, parallel layers with minimal mixing, turbulent flow exhibits highly irregular, three-dimensional patterns. This behavior arises due to instabilities in the fluid's velocity profile, and amplifies as the flow velocity increases. Minor disturbances, known as turbulent...
921
Uniform Depth Channel Flow01:27

Uniform Depth Channel Flow

876
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...
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関連する実験動画

Updated: Apr 30, 2026

Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
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Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

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イベント誘導型マイクロ流体ホログラムは,空間周波数学習によるぼやけを解除しています.

Dunhong Huang, Jie Xu, Haixin Luo

    Optics express
    |February 20, 2026
    PubMed
    まとめ
    この要約は機械生成です。

    この研究では,高速粒子画像から微流体ホログラムの模糊を解除するためのイベント誘導ネットワークを導入しています. この新しいアプローチは,粒子分析とフローサイトメトリーの再構築品質を向上させます.

    さらに関連する動画

    A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways
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    A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways

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    Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
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    Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System

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    関連する実験動画

    Last Updated: Apr 30, 2026

    Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
    12:26

    Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

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    A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways
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    A Microfluidic Model of Biomimetically Breathing Pulmonary Acinar Airways

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    Induction of Microstreaming by Nonspherical Bubble Oscillations in an Acoustic Levitation System
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    科学分野:

    • 光学とフォトニック
    • バイオメディカルエンジニアリング
    • コンピュータビジョン コンピュータビジョン

    背景:

    • マイクロ流体ホログラム画像は粒子の分析に不可欠ですが,高速アプリケーションでは,モーション・ブラーに苦戦しています.
    • 既存の模糊除去方法は,フリンジに富んだホログラムの高周波パターンに対して無効です.

    研究 の 目的:

    • 従来の方法の限界を克服するマイクロフリウイドホログラフィーの先端の模糊除去技術を開発する.
    • 高速で移動する標的からのホログラムの復元品質を改善するために.

    主な方法:

    • イベント誘導の空間周波数学習アプローチが開発され,イベントセンサーの時間解像度を活用しました.
    • イベント誘導型デュアルドメイン適応融合ネットワーク (EDAF-Net) を設計し,空間領域と周波数領域を統合した.
    • ダブルドメインの融合モジュールは,スペクトルフィデリティと空間的精度を維持するために組み込まれました.

    主要な成果:

    • EDAF-Netは,最先端の方法と比較して,より優れた高周波フリンジ回収を実証しました.
    • 提案されたネットワークは,比較された方法の中で最も低いモデルの複雑性と計算負荷を達成しました.
    • 実験的検証により,標準化されたマイクロ球とヒト赤血球の有効性が確認されました.

    結論:

    • 開発されたEDAF-Netは,マイクロ流体ホログラム画像のモーションブラアに効果的に対処します.
    • この方法は,定量的粒子分析とフローサイトメトリの応用を強化します.
    • このアプローチは,高速ホログラム模糊除去のための計算効率の高いソリューションを提供します.