> I do not know how to output below values:
> 1- u_r
> 2- sigma_xx, sigma_yy
> 3- sigma_rr , sigma_tt
For computing these values you should have a look at the DataPostProcessor
class . Its use is explained in step-29.
What you basically want to do for u_r in there is something like
double r =
computed_quantities[i](0) = uh[i](0)*evaluation_points/r +
and similar things for sigma_*.
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