From: Kirk, Benjamin (JSC-EG311) <benjamin.kirk-1@na...> - 2011-12-30 16:49:37
> What is the best way to add post processing fields (say Stress/Strain) to a
> LinearSystem? Preferably a way that they would get written to exodusII
> output automatically!
A system defines a set of unknowns which in general are tightly coupled.
This is especially the case for a LinearSystem, where the expectation is
there is an underlying matrix object which will hold the discrete operator
coupling all the variables in that system.
The general approach for adding other post-processing fields is by adding
another system. Usually the "System" class is sufficient - it will give you
a solution vector and DOF storage, which is all you need to do to have
explicit post processing variables. Then your existing output code will
write the variables in all systems in your EquationSystems object.
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