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Re: Calculating streamfunction from wind components [message #84256 is a reply to message #83239]

Fri, 10 May 2013 09:32

Kenneth Bowman
Messages: 86
Registered: November 2006

Member

On 2013-05-09 20:40:32 +0000, james.rachelanne@googlemail.com said:

> Hi Liam,
>
> I'm looking to do something similar. Did you ever find anything useful?
>
> Cheers,
>
> Rachel

Is the flow 2-D and incompressible so that

u = - d psi/dy

and

v = d(psi)/dx ?

Depending on your boundary condtions, you may be able to integrate
across the domain in one direction or the other to get a streamfunction.

Otherwise you have to solve the elliptic problem for psi. There is a
table of cases (2-D, 3-D, irrotational, etc.) in Dutton's book on
atmospheric dynamics.

You can calculate streamlines (which are equivalent to the
streamfunction in special cases) using a trajectory model (which is, in
general, a non-trivial undertaking).

Ken Bowman

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[Message index]

		Calculating streamfunction from wind components By: Sir Loin Steak on Thu, 14 February 2013 09:22
		Re: Calculating streamfunction from wind components By: Kenneth Bowman on Fri, 10 May 2013 09:32
		Re: Calculating streamfunction from wind components By: james.rachelanne on Mon, 20 May 2013 03:08
		Re: Calculating streamfunction from wind components By: james.rachelanne on Thu, 09 May 2013 13:40

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