[Nek5000-users] Volume integral time derivative vorticity

[nek5000-users at lists.mcs.anl.gov]

I performed some simulations around a plunging flat plate.
I have to compute the volume integral over a choosen domain (a rectangle around the body with a fixed geometrical dimension) of the eulerian time derivative of the vorticity field multiplied by the local position vector components. I found a subroutine to compute the vorticity. How should I compute vorticity at the previous timestep? And how can I perform the integrations? 
⁣
Thanks
Mario

Mario Ostieri 

Ph.D. Student 
University of Naples Federico II 
Department of Industrial Engineering 
Piazzale V. Tecchio 80 
80125 Napoli, Italy 
tel. +390817682184 
email: mario.ostieri at unina.it
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