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関連する概念動画

Capillarity in Fluid01:19

Capillarity in Fluid

518
Capillarity describes the movement of liquid in small spaces without external forces acting on it. The capillarity is driven by surface tension and adhesive interactions between the liquid and surrounding solid surfaces. This effect is often seen in narrow tubes, porous materials, and fine particles.
Surface tension is crucial to capillarity. It results from cohesive forces between liquid molecules at the liquid-air boundary, forming a skin that resists external forces. When the capillary tube...
518
Rise of Liquid in a Capillary Tube01:18

Rise of Liquid in a Capillary Tube

2.6K
When very thin cylindrical tubes, called capillaries, are dipped in a liquid, the liquid rises or falls in the tube compared to the surrounding liquid. This phenomenon is called capillary action. Capillary action occurs due to the combination of two opposing forces: the cohesive forces of the liquid, which cause it to stick to itself and form a rounded shape, and the adhesive forces between the liquid and the walls of the container, which cause the liquid to be attracted to the container walls.
2.6K
Autoregulation of Blood Flow01:17

Autoregulation of Blood Flow

6.5K
Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
6.5K
Pressure of Fluids01:14

Pressure of Fluids

17.8K
There are many examples of pressure in fluids in everyday life, such as in relation to blood (high or low blood pressure) and in relation to weather (high- and low-pressure weather systems). A given force can have a significantly different effect, depending on the area over which the force is exerted. For instance, a force applied to an area of 1 mm2 has a pressure that is 100 times greater than the same force applied to an area of 1 cm2. That's why a sharp needle is able to poke through...
17.8K
Controlled-Current Coulometry: Overview01:27

Controlled-Current Coulometry: Overview

398
Controlled current coulometry, also known as amperostatic coulometry, is a technique used in electrochemical analysis to measure the quantity of a substance through the controlled passage of current. It involves the application of a constant current to an electrochemical cell containing the analyte of interest. As the current flows through the cell, the analyte undergoes a redox reaction at the electrode surface, resulting in a charge transfer. By monitoring the time required for a certain...
398
Laminar Flow01:27

Laminar Flow

1.5K
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:
1.5K

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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays
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Microfluidic Chips Controlled with Elastomeric Microvalve Arrays

Published on: October 1, 2007

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プログラム可能な毛細血管作用で流体の流れを制御する

Tammi L van Neel, Ashleigh B Theberge

    Nature
    |July 1, 2021
    PubMed
    まとめ

    No abstract available in PubMed .

    キーワード:
    エンジニアリング流体力学材料科学

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