2013年11月1日 · Their formation has previously been hypothesized as due to three different mechanisms: (i) vertical uplift in a lee vortex (which has a horizontal axis), (ii) adiabatic expansion along quasi-horizontal trajectories (the so-called Bernoulli effect), and (iii) a mixing cloud (i.e., condensation through mixing of two unsaturated air masses).

伯努利原理是流体力学中的一条基本原理，它由瑞士流体物理学家丹尼尔·伯努利在1726年提出，其实质是理想流体的机械能守恒。 在理想条件下，同一流管的任何一个截面处，单位体积流体的动能、势能和压力势能之和是一个常量 [1]。 其最为著名的推论为：等高流动时，流速越大，压强越小。 流体力学中经常说的压力，其实指的是单位面积上的压力，也就是普通物理学里说的压强。 即伯努利方程。 其中， 为流体中某点的压强， 为流体在该点的流速， 为流体密度， 为重力 …

2023年8月7日 · Clouds form when particular conditions of temperature and humidity intersect. In the case of lenticular clouds, those conditions occur at specific locations slightly downwind from the tops of mountains -- a standing wave forms in the air between areas of low and high humidity, much as standing waves form in river rapids.

2021年10月25日 · The answer is that the pressure change is the cause and the flow velocity is the effect. Note that the Bernoulli theorem applies to the changes of P P, ρ ρ, u u, ϕ ϕ and v v along a streamline. It is not a statement about pressure gradients in some other direction. Let's take a case where u u and ϕ ϕ are independent of position.

在流體動力學，白努利原理指出，無黏性的流體的速度增加時，流體的壓力能或位能（位能）總和將減少。 白努利原理可以應用到不同類型的流體流動，從而是可廣泛套用的白努利方程式表示式。 事實上，有不同類型的白努利方程式不同形式的。 白努利原理的簡單形式是有效的不可壓縮流動（如液體流動），也為移動可壓縮流體（如氣體）在低 馬赫數 （通常小於0.3）。 更先進的形式可被應用到在某些情況 下，在更高的馬赫數（見白努利方程式的推導）可壓縮流。 白努利定律 …

2024年5月21日 · The Bernoulli effect, or the Bernoulli principle or Bernoulli's law, is a statement of relationship between flow speed and pressure in a fluid system; in essence, when the speed of horizontal flow through a fluid increases, the pressure decreases.

2022年12月23日 · 在稳定流动中，流体的流速越大，压强越小；流体的流速越小，压强越大。 1738年，数学家D.伯努利在《流体力学》中首次提出。 又称伯努利原理、伯努利定律。 英文名称 Bernoulli effect 又称 伯努利原理、伯努利定律 提出者 D.伯努利 创建时间 1738 所属学科 语言文字

The Bernoulli Effect Michael Fowler Suppose air is being pumped down a smooth round tube, which has a constant diameter except for a section in the middle where the tube narrows down to half the diameter, then widens out again.

The Bernoulli effect provides that, when a gas such as air flows, its pressure drops. This is the basis for how aircraft wings work: The cross-sectional shape of the wing, called an aerofoil (or airfoil), forces air to follow a longer path over the top of the wing, thereby speeding it up and creating a net upward force called lift.

The Bernoulli Effect The air across the top of an airfoil experiences constricted flow lines and increased air speed relative to the wing. According to Bernoulli, this results in a decrease in pressure along the top of the airfoil and provides a lift force.