Everything about Ekman Layer totally explained
In standard
boundary-layer theory, the effects of
viscous diffusion are usually balanced by convective
inertia. When a fluid rotates, however, the dominant balance may instead be struck between diffusion effects and the
Coriolis force. Under these circumstances we're dealing with an
Ekman layer, named after
Vagn Walfrid Ekman.
In addition to enforcing the zero
velocity condition at the wall, these Ekman layers can also control long-range properties of the
flow. A classical illustration is given by the everyday experience of how a cup of tea returns to rest after stirring. We might model this from the decay of the rigid body motion through dissipative effects, which reach out from the stationary sides of the cup over a diffusion timescale
»
where vertical flow velocities are reduced to zero. In a highly non-linear regime where the change of rotation rate is substantial, resulting in a non-negligible
Rossby number, the Stewartson layers can become detached from the side walls and propagate into the core flow.
==
Further Information
Get more info on 'Ekman Layer'.
|
External Link Exchanges
Do you know how hard it is to get a link from a large encyclopaedia? Well we're different and will prove it. To get a link from us just add the following HTML to your site on a relevant page:
<a href="http://ekman_layer.totallyexplained.com">Ekman layer Totally Explained</a>
Then simply click through this link from your web page. Our crawlers will verify your link, extract the title of your web page and instantly add a link back to it. If you like you can remove the words Totally Explained and embed the link in article text.
As long as your link remains in place, we'll keep our link to you right here. Please play fair - our crawlers are watching. Your site must be closely related to this one's topic. Any kind of spamming, dubious practises or removing the link will result in your link from us being dropped and, potentially, your whole site being banned. |
