Velocity gradients from previous timesteps
I would like to make a plot of time averaged vorticity in an unsteady simulation I am running. Since vorticity is not one of the quantities avaiable for producing time averaged statistics I will have to make a UDF for this.
Thus I need to access the velocity gradients from previous timesteps in my UDF but cannot see any macros which allow this. Any ideas?
Any help would be much appreciated.
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