関連する実験動画

Updated: Jul 12, 2026

High-speed Particle Image Velocimetry Near Surfaces
11:59

High-speed Particle Image Velocimetry Near Surfaces

Published on: June 24, 2013

南極の氷河流の衛星画像から導かれた速度場

R A Bindschadler, T A Scambos

    Science (New York, N.Y.)
    |April 12, 1991
    PubMed
    まとめ

    高解像度の衛星画像は,表面の地形学に関連した氷河流の速度の変化を明らかにしています. これらの発見は,以前の氷の流れモデルと質量バランス計算に異議を唱えている.

    さらに関連する動画

    Echo Particle Image Velocimetry16:31

    Echo Particle Image Velocimetry

    Published on: December 27, 2012

    Spatial Temporal Analysis of Fieldwise Flow in Microvasculature09:39

    Spatial Temporal Analysis of Fieldwise Flow in Microvasculature

    Published on: November 18, 2019

    関連する概念動画

    Average and Instantaneous Velocity Vectors01:12

    Average and Instantaneous Velocity Vectors

    To calculate other physical quantities in kinematics, the time variable must be introduced. The time variable not only allows us to state where an object is (its position) during its motion, but also how fast it’s moving. The speed at which an object is moving is given by the rate at which the position changes with time. For each position, a particular time is assigned. If the details of the motion at each instant are not important, the rate is usually expressed as the average velocity v. This...
    Instantaneous Velocity - I01:15

    Instantaneous Velocity - I

    The average velocity during a time interval cannot tell us how fast or in what direction a particle is moving at any given time during the interval. To calculate this, it is important to know the instantaneous velocity, which is the velocity at a specific instant of time or at a specific point along the path. Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity vx of an object is the limit of the average...
    Velocity Potential01:20

    Velocity Potential

    In steady, incompressible flow through a long, straight pipe with a uniform cross-section, the flow in the central region (far from the pipe walls) is irrotational. This irrotational nature means that fluid particles do not rotate around their axes, and a scalar function called the velocity potential, represented by ϕ, can be used to describe their movement. In irrotational flows, the velocity field V is defined as the gradient of the velocity potential:
    Irrotational Flow01:28

    Irrotational Flow

    Irrotational flow is characterized by fluid motion where particles do not rotate around their axes, resulting in zero vorticity. For a flow to be irrotational, the curl of the velocity field must be zero. This imposes specific conditions on velocity gradients. For instance, to maintain zero rotation about the z-axis, the gradient condition:
    Relative Motion Analysis - Velocity01:24

    Relative Motion Analysis - Velocity

    A stroke engine has a slider-crank mechanism that converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider.
    When an external force is exerted, it sets the crank into a rotational movement. This, in turn, instigates the motion of the connecting rod, leading to what is referred to as a general plane motion. This process involves two key points - point A on the connecting rod...
    Instantaneous Velocity - II01:10

    Instantaneous Velocity - II

    Instantaneous velocity is the quantity that measures how fast an object is moving along its path. In other words, the instantaneous velocity of an object is the limit of the average velocity as the elapsed time approaches zero, or the derivative of displacement with respect to time. Like average velocity, the instantaneous velocity is a vector with the dimensions of length per unit time. Instantaneous velocity can have both positive and negative values. The instantaneous velocity can be...