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関連する概念動画

Turbulent Flow: Problem Solving01:09

Turbulent Flow: Problem Solving

435
Carbonation is a process used to dissolve carbon dioxide gas in a liquid, commonly used in the production of carbonated beverages. Achieving efficient carbonation requires careful control of temperature, pressure, and flow conditions. By adjusting these parameters, carbonation efficiency can be maximized, producing a higher concentration of CO2 in the liquid.
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures enhance...
435
Turbulent Flow01:24

Turbulent Flow

792
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...
792
Uniform Depth Channel Flow: Problem Solving01:18

Uniform Depth Channel Flow: Problem Solving

548
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...
548
Newtonian Fluid: Problem Solving01:18

Newtonian Fluid: Problem Solving

1.0K
Newtonian fluids exhibit a constant viscosity, meaning their shear stress and shear strain rate are directly proportional. This property ensures a predictable and stable response to applied forces, maintaining a linear relationship between force and flow. Examples include water, air, and light oils, consistently demonstrating this proportional behavior regardless of external conditions.
A velocity gradient forms within the fluid when a Newtonian fluid is placed between two parallel plates, with...
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Laminar and Turbulent Flow01:07

Laminar and Turbulent Flow

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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...
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Magnetostatic Boundary Conditions01:28

Magnetostatic Boundary Conditions

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An electric field suffers a discontinuity at a surface charge. Similarly, a magnetic field is discontinuous at a surface current. The perpendicular component of a magnetic field is continuous across the interface of two magnetic mediums. In contrast, its parallel component, perpendicular to the current, is discontinuous by the amount equal to the product of the vacuum permeability and the surface current. Like the scalar potential in electrostatics, the vector potential is also continuous...
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関連する実験動画

Updated: Feb 20, 2026

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
09:17

Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

Published on: April 23, 2018

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サイアムのネットワークベースの渦束の修正と海洋の乱流における識別.

Haichao Zhan, Yang Qu, Le Wang

    Optics express
    |February 18, 2026
    PubMed
    まとめ

    この研究では,歪んだ渦輪ビームを修正し,水中無線光通信 (UWOC) の軌道角運動量 (OAM) モードを特定するためにシアムネットワークを導入します. この方法は,海洋乱流 (OT) の影響を効果的に軽減し,UWOCシステムのパフォーマンスを向上させます.

    科学分野:

    • オプティカル・コミュニケーションズ (OPC)
    • シグナル処理 信号処理
    • 機械学習 (Machine Learning) とは,機械学習 (Machine Learning) について学ぶことです.

    背景:

    • ヴォルテックスビームは,水中無線光通信 (UWOC) のチャネル容量を高めます.
    • 海洋の乱れ (OT) は渦束を大きく歪め,UWOCの質を低下させる.
    • 軌道角運動量 (OAM) モードの正確な識別と歪み修正は,堅牢なUWOCのために不可欠です.

    研究 の 目的:

    • UWOCシステムのための共同の歪曲補正とOAMモード識別方法を開発する.
    • シアム系ネットワーク (SN) を使用して,提案されたアプローチを実験的に検証する.
    • 限られたデータで正確なOAMモードの識別とZernike係数の予測を可能にするために.

    主な方法:

    • フェーズスクリーンと強度パターンの特徴抽出と融合のために,サイアムのネットワーク (SN) アーキテクチャが採用されました.
    • OAMモードの同時識別とZernike多項式係数の予測のために,SN内に分類ネットワークが統合されました.
    • このアプローチは,限られた数のトレーニングサンプルで効果的に機能するように設計されました.

    主要な成果:

    • SNは,4つのOAMモードを正確に特定し,4つのレベルの海洋乱流 (OT) に対してZernike係数を予測しました.

    さらに関連する動画

    Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques
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    Simultaneous Measurement of Turbulence and Particle Kinematics Using Flow Imaging Techniques

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    Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
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    Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

    Published on: July 19, 2016

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    関連する実験動画

    Last Updated: Feb 20, 2026

    Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods
    09:17

    Experimental Investigation of the Flow Structure over a Delta Wing Via Flow Visualization Methods

    Published on: April 23, 2018

    11.3K
    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

    7.6K
    Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section
    11:00

    Experimental Investigation of Secondary Flow Structures Downstream of a Model Type IV Stent Failure in a 180° Curved Artery Test Section

    Published on: July 19, 2016

    12.0K
  • 予測係数を用いた再構築されたフェーズスクリーンは,歪んだ渦のビームの高品質の修正を容易にした.
  • SNは,限られたサンプルデータであっても,堅実な汎用化パフォーマンスを示しました.

    • 結論:

    • 提案されたSNベースの方法は,UWOCの渦束の歪みを修正するための効果的な解決策を提供します.
    • このアプローチにより,OAMモードの信頼性の高い識別と,困難な水中環境における乱流の軽減が可能になります.
    • この研究は,UWOCシステムの性能と信頼性を向上させるための新しい経路を示しています.