Hi everybody I want to calculate the mean normal velocity component on a given boundary after solving the stokes equations.I was wondering if this can be done within the library or I have to find a vizualization package doing that.I guess I have to find out the value of the desired component on the global boundary node and weight it by the area surrounding that node and then dividing by the area/length of the boundary.Does anyone knows how this can be done in deal.II or to propose a way to do this? I would like also to ask if there is a way to get the position of the center of an element without having to calculate it?I am using a taylor-hood element so I assume that a node exists already at this point so is there a way of getting this information? All the best Alex
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