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Is Mathematica able to rearrange systems of PDEs (NOT solve them)?

Posted 11 years ago
POSTED BY: Lennart M
2 Replies
Posted 11 years ago

Then what would be the right way of telling Mathematica what I want? I tried to input my equations e.g. like this

eqn={D[u[x,y],x]+D[v[x,y],y]==0,eta[x,y]==Sqrt[ue/(nu*x)]*y,psi==Sqrt[ue*nu*x]*f
[eta[x,y]],u[x,y]==D[psi[x,y],y],v[x,y]==-D[psi[x,y],x]}
FullSimplify[eqn]

Thus specifying which functions I have, and what their parameters are (u is a function of x and y, f is a function of eta, eta is a function of x and y again, ...) and then using FullSimplify, or Eliminiate[eqn, {x,y}] to get rid of the variables I don't want, but nothing happened, so I guess this is the wrong approach.

POSTED BY: Lennart M

I've only glanced at the Falkner Skan Derivation that you attached, but I'd say that if you can do it on paper, you can program it (and probably more generally) in Mathematica. I'd advise working through the derivation that you posted step-by-step in Mathematica and then proceed to generalize what you discover in one or more functions. it will probably be non-trivial, but doable.

POSTED BY: David Reiss
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