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 Post subject: Very simple problem: BernoulliPosted: Wed, 30 Jan 2008 22:24:00 UTC
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Joined: Mon, 26 Nov 2007 18:02:52 UTC
Posts: 55
This was a very simple problem driving me competely insane.

The point was to derive bernoulli's equation (from the NS equations) assuming barotropic flow. That is, assuming .

Now at one point in the proof, you are suppose to show,

I can do it. At least on a purely algebraic level:

Let . Then, the above becomes,

However, I can't understand why this works. I'm sure there is a very simple reason for all this. I just can't see it.

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 Post subject: Posted: Thu, 31 Jan 2008 10:25:23 UTC
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Joined: Mon, 26 Nov 2007 18:02:52 UTC
Posts: 55
never mind. I figured it out.

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