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関連する概念動画

General External Flow Characteristics01:26

General External Flow Characteristics

The study of external flow is essential for creating structures and objects that interact efficiently and safely with moving fluids, such as air or water. When a body is immersed in a flowing fluid, it experiences two primary forces: drag, which opposes motion along the flow direction, and lift, which acts perpendicular to the flow. The shape, size, and orientation of the object influence these forces.Streamlined and Blunt Bodies in External FlowObjects in fluid flow are classified as...
Boundary Layer Characteristics01:18

Boundary Layer Characteristics

When a fluid encounters a solid surface, a boundary layer forms due to the interaction between the fluid's motion and the stationary surface. This phenomenon is characterized by a thin region adjacent to the surface where viscous forces dominate, influencing the fluid's velocity profile. The development of the boundary layer begins at the leading edge of the surface and evolves as the fluid moves downstream.As the fluid flows over the surface, friction between the fluid and the wall slows down...
Steady, Laminar Flow Between Parallel Plates01:17

Steady, Laminar Flow Between Parallel Plates

Understanding steady, laminar flow between parallel plates is essential for analyzing and designing flow in narrow rectangular channels, commonly found in various water conveyance and drainage systems. The Navier-Stokes equations govern fluid motion and are generally challenging to solve due to their nonlinearity. However, simplifications are possible in certain cases, like the steady laminar flow between parallel plates. For this scenario, we assume steady, incompressible, laminar flow.
Steady, Laminar Flow in Circular Tubes01:23

Steady, Laminar Flow in Circular Tubes

Hagen-Poiseuille flow describes a viscous fluid's steady, incompressible flow through a cylindrical tube with a constant radius R. This flow profile is often applied to understand fluid transport in narrow channels, such as capillaries. It serves as a foundational example of laminar flow. In this model, cylindrical coordinates (r,θ,z) are used to describe the radial (r), angular (θ), and axial (z) dimensions within the tube. For Hagen-Poiseuille flow, the velocity profile is purely axial,...
Precipitation Processes01:12

Precipitation Processes

The experimental conditions in a gravimetric analysis should be optimized to maximize the particle size and purity of the obtained precipitate. Ideally, the concentration of the precipitating reagent should be low with effective stirring to maintain low relative supersaturation for the growth of large crystals. In homogeneous precipitation, the precipitant is slowly generated by a chemical reaction in the solution to avoid local reagent excesses. For example, urea decomposes gradually to...
Laminar Flow01:27

Laminar Flow

Laminar flow represents a smooth, orderly fluid motion where particles move along parallel paths, resulting in minimal mixing between layers. Streamlined particle paths characterize this flow regime and occur under conditions where viscous forces dominate over inertial forces. The distinction between laminar, transitional, and turbulent flow is primarily determined by the Reynolds number, a dimensionless quantity calculated as:

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関連する実験動画

Updated: Jul 11, 2026

Measuring Spray Droplet Size from Agricultural Nozzles Using Laser Diffraction
08:14

Measuring Spray Droplet Size from Agricultural Nozzles Using Laser Diffraction

Published on: September 16, 2016

自然気流による冷却塔の降雪の観測.

M L Kramer, D E Seymour, M E Smith

    Science (New York, N.Y.)
    |September 24, 1976
    PubMed
    まとめ

    大規模な自然気流冷却塔は雪を降らせる可能性があります. 1975年から1976年に観測されたこの現象は,雪の積もりと発電所の近くの視界の低下をもたらしました.

    科学分野:

    • 環境科学 環境科学
    • 大気科学 大気科学
    • エンジニアリング エンジニアリング

    背景:

    • 大型の自然気流冷却塔は,廃熱を散らすために発電所で使用されます.
    • 特に冬の間,冷却塔の羽根がもたらす大気への影響は,調査が必要である.

    研究 の 目的:

    • 冷却塔の羽根に起因する降雪の発生を記録し,分析する.
    • 積雪の程度とその視界への影響を評価する.

    主な方法:

    • 1975年から1976年の冬の観察研究.
    • 冷却塔の周辺の積雪と視界のフィールド測定.

    主要な成果:

    • 降雪は冷却塔の羽根から生じたと観察されました.
    • 塔からの距離で地面に積もった雪は2.5cmに達した.
    • 視界は,地表に近い羽根の中で1600メートル未満に減少しました.

    結論:

    • 冷却塔の羽根は,局所的な降雪イベントにつながる可能性があります.
    • これらのイベントは,地上条件と視界に影響を与え,緩和戦略のためのさらなる研究を必要とします.

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    Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
    10:29

    Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

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    Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow
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    Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow

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    Last Updated: Jul 11, 2026

    Measuring Spray Droplet Size from Agricultural Nozzles Using Laser Diffraction
    08:14

    Measuring Spray Droplet Size from Agricultural Nozzles Using Laser Diffraction

    Published on: September 16, 2016

    Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames
    10:29

    Experimental Methodology for Estimation of Local Heat Fluxes and Burning Rates in Steady Laminar Boundary Layer Diffusion Flames

    Published on: June 1, 2016

    Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow
    08:25

    Measurements of Local Instantaneous Convective Heat Transfer in a Pipe - Single and Two-phase Flow

    Published on: April 30, 2018