Physics Help Forum Fluid mechanics problem

 Jul 2nd 2014, 12:54 AM #1 Junior Member   Join Date: Jul 2014 Posts: 5 Fluid mechanics problem Hello everyone, I have a current problem I need help with (attached below). I'm not a mechanical engineer by any means so if you guys could kindly point me in the right direction, that would be a huge lifesaver! Thanks! Attached Thumbnails
Jul 2nd 2014, 08:31 AM   #2

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 Originally Posted by asmpic Hello everyone, I have a current problem I need help with (attached below). I'm not a mechanical engineer by any means so if you guys could kindly point me in the right direction, that would be a huge lifesaver! Thanks!
I presume you are trying to find an ensemble average? I'm not going to type out the LaTeX, just simply say this:

The ensemble average if a property P is equal to
(Integral) A exp[] dv
Or whatever v may be in your problem.

Without you showing work I have no clue how to help you more.

-Dan
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Jul 3rd 2014, 04:15 AM   #3
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 Originally Posted by topsquark I presume you are trying to find an ensemble average? I'm not going to type out the LaTeX, just simply say this: The ensemble average if a property P is equal to (Integral) A exp[] dv Or whatever v may be in your problem. Without you showing work I have no clue how to help you more. -Dan

Thanks for the quick reply. Actually, I think I need to find mean energy

So, would I "simply" take the integral of (1/2)m*(v_x)^2 * f(v) dv_x, from +/- infinity?

Sorry, I don't know how to do the latex on this forum yet.

Last edited by asmpic; Jul 3rd 2014 at 04:30 AM.

Jul 3rd 2014, 09:55 PM   #4

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 Originally Posted by asmpic Thanks for the quick reply. Actually, I think I need to find mean energy So, would I "simply" take the integral of (1/2)m*(v_x)^2 * f(v) dv_x, from +/- infinity? Sorry, I don't know how to do the latex on this forum yet.
No problems. And yes, that's what you need to do.

-Dan
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