[Nektar-users] Output turbulent kinetic energy, dissipation and divergence velocity

Dear users, I have two problems/questions: First I would like to compute the time averaged field of the 'turbulent kinetic energy' and 'dissipation' at the end of my compressible flow solver simulation. How can I generate them? Is there already any filter? In the user-guide I realized the option "to compute time-averaged fields for each variable defined in the session file" at page 40. By default my variables in the compressible flow solver are: rho, rho*u, rho*v, rho*w and E. So it's only possibly to generate the time-averaged values of them or do I have any other option? And my second question: How can I compute the divergence u at an instantaneous time step? Best regards Fabian