# Tag Info

## New answers tagged vortex

1

A space time vortex is caused by frame dragging when a massive object spins. For example, the Gravity Probe B experiment found that the Earth drags space time curvature with it as it spins; a vortex of space time curvature forms around the Earth. The axis of the space time vortex drifts as the earth spins, and this drift is what Gravity Probe B was able to ...

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Is there a connection between a Space-Time Vortex and gravitational waves? Yes. Take a look at this NASA article about Gravity Probe B and gravitomagnetism: "Einstein was right again. There is a space-time vortex around Earth, and its shape precisely matches the predictions of Einstein's theory of gravity." Public domain image courtesy of NASA One of ...

2

Consider the Navier-Stokes equations $$\frac{\partial \bf{u}}{\partial t}+\bf{u}\cdot\nabla \bf{u}=-\nabla p+\nu \nabla^2\bf{u}.$$ We can rewrite the inertial term as $$\bf{u}\cdot\nabla \bf{u}=\frac{1}{2}\bf{u}^2-\bf{u}\times\boldsymbol{\omega}.$$ Therefore, the Navier-Stokes equations can be rewritten as \frac{\partial \bf{u}}{\partial ...

0

As pointed out by honeste- If the downward equal-opposite flow is some distance from the tornado vortex, how it would be communicated to that flow to exactly equal the lift-force of vortex contacting a large flat surface. Here he means that downward force , as per Newton's law is applied some distance away from vortex. It would just be like you are picking ...

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The characteristic length is the dimension that defines the length scale of a physical system. This implies that for any system, which my contain several length scales, there may only be one characteristic length scale. This is also generalizable to the other characteristic scales such as time, speed, etc. As you may have read in my other answer, generally ...

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