# Questions tagged [bernoulli-equation]

An equation governing fluid flow for an incompressible steady fluid

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### Explain hydrodynamic Levitation

I had researched it and I saw everyone has there different answer. Someone says its Magnus effect, someone says it is Coanda effect and someone says its Bernoulli's principle. Can it be specific? What ...
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### How does high velocity cause low pressure? [duplicate]

Bernoulli's principle states that air molecules moving with high velocity create an area of low pressure which in turn causes an object to fly, but how does high velocity cause low pressure?
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### About deriving bernoulli equation from particle model and its pressure difference

Here i added a page from my fluid dynamics book where it shows particle model for deriving the equation. My question is why pressure is more at stream side aka 'positive "s" direction'.I would ...
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### Does Bernoulli's equation describe why my curtains stick to the mesh?

I was sitting right in front of a big window (with a mesh) with curtains open, suddenly wind swooshes in, curtains sway forth and back. While they sway backward, they stick to the window(mesh) as if ...
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### Does the number of holes in the bottom of a bucket determine the height at which the pull of gravity overcomes the surface tension?

Ok, my colleague and I are having a debate that we need help with. Neither one of us works in this space (chemist and materials scientist) and we understand this should be pretty straight forward ...
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### Does high pressure force an object to a lower pressure area?

Suppose a ball is spinning through mid air. We know through the Magnus effect the way the ball will go. On the side where the air flow is slowed down due to the spin of the ball, the pressure ...
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### Why does the air flowing above the aerofoil moves faster than the air flowing below the aerofoil? [duplicate]

https://www.youtube.com/watch?v=UqBmdZ-BNig why can't it be the other way around that the air flowing below the chamber moves faster than the air moving above the upper chamber?
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### A contradiction from two reliable sources on the principle of how siphons work

At 39:08 of Lecture 28 of 8.01x by Walter Lewin, a water siphon would not work if the distance is over 10 meters due to the barometric pressure. However, this claim is seemingly refuted by Periodic ...
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### How does pressure become velocity in a jet engine axial turbine?

All right. Here's what I understand about axial turbines: It is an axial compressor in reverse. An axial compressor forces air to flow in an increasingly tight space, where there is not enough ...
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### Does the shape of the pipe (the length not the cross section area) affect resistive force?

Does the shape of the pipe (the length not the cross section area) affect resistive force acting on water? Does keeping the pipe straight or keeping it in curves folded over each other effect the ...
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### When solving using Bernoulli's principle, is the pressure potential energy per volume of atmospheric pressure water 0 Pa or 100,000 Pa?

I was just given a question using Bernoulli's principle that gives you the pressure of water (e.g. $1,000,000 \mathrm{Pa}$) in a hose, and asks for the speed of the water after the water has left the ...
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### Could the Bernoulli equation be explained by kinetic theory?

I have watched on the Youtube channel of Eugene Khutoryansky an explanation of the Bernoulli equation on the molecular level. It states that" An atom is more likely to enter the narrow section of a ...
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### Calculating the flow rate in a non-ideal siphon?

When calculating flow rate in a siphon, the simplifying assumption is usually made that the velocity head at the input is effectively zero. This requires that the cross-sectional area at the input be ...
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### Faucet Atomizers and Aerators - Volume Flow Rate

It is said that atomization nozzles and aerators in the faucet save water. They reduce the volume flow rate of the nozzle. If this is true then isn't the equation of continuity violated? For example,...
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### Bernoulli equation constant for water waves

A fluid fills $\{(x,y,z) \in\mathbb{R}^3:y \leq0\}$. The flow $\textbf{u}=(u,v,w)$ is given by $u=k\sin(\omega t)\cos(kx)e^{-|k|y}$, $v=-|k|\sin(\omega t)\sin(kx)e^{-|k|y}$, $w=0$, for $y\leq0$. We ...
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