Hi, 

   I am attempting to implement my SUPG solver for Euler equations within 
libMesh via the FEMSystem API. A couple of questions: 

--  I am assuming that when elem_time_derivative is called, elem_solution in 
the FEMContext stores the u. Similarly, when the mass_residual is called, 
elem_solution stores the u_dot and elem_fixed_solution stores the u. Is that 
correct? 

-- How do I get the element u_dot vector when elem_time_derivative is called? 

    I would appreciate any help. 

Thanks,
Manav



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