On 10/7/21 10:20 AM, Giovanna Bucci wrote:

Is there a built-in function to apply a velocity field which points in the direction normal to the boundary? Or I could implement a modified version of the compute_nonzero_normal_flux_constraints function that does that

I don't think there is such a function. But if you look at how the function is implemented, it's probably not too complicated to modify it for your purposes.

Best
 W.


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Wolfgang Bangerth          email:                 [email protected]
                           www: http://www.math.colostate.edu/~bangerth/

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