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Search: Posts Made By: FMDenaro
Forum: Main CFD Forum May 17, 2012, 14:20
Replies: 15
Views: 6,920
Posted By FMDenaro
such equation makes no sense for me ...

such equation makes no sense for me ...
Forum: Main CFD Forum May 17, 2012, 13:34
Replies: 15
Views: 6,920
Posted By FMDenaro
However, I don't understand your 2D case... it...

However, I don't understand your 2D case... it should imply a set of two equations:

Ut + UUx +VUy=0
Vt + UVx +VVy=0

each one says U and V are constant along the curves dx/dt=U and dy/dt=V,...
Forum: Main CFD Forum May 17, 2012, 04:41
Replies: 15
Views: 6,920
Posted By FMDenaro
The Burgers equation du/dt + u*du/dx =0 ...

The Burgers equation

du/dt + u*du/dx =0

implies that the velocity is constant along particolar curves, called "characteristic lines".
To see that, write the total differential of u(x,t):
...
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