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From: Bernd Paysan on 4 Nov 2009 08:16 Terje Mathisen wrote: > Robert, isn't the interesting/relevant part of Fluid Mechanics the fact > that almost all interesting flow regimes are impossible to solve > exactly, so even the science part of it becomes a set of simplified > equations for various hopefully interesting subsets? Hm, the only science I know where you can solve some interesting problems exactly is math. Fluid Mechanics is a many-particle problem, and of course it requires approximations of all sorts. Even the basic idea that particles stay as they are is not true inside the rocket engine: There e.g. 2*H₂+1*O₂ gives 2*H₂O, i.e. only two thirds of the molecules entering the engine leave it on the other side. -- Bernd Paysan "If you want it done right, you have to do it yourself" http://www.jwdt.com/~paysan/ |