[aspect-devel] internal velocity boundary conditions

[Wolfgang Bangerth]

On 05/15/2015 11:29 AM, Magali Billen wrote:
>
> Yes, I understand that. My problem is that given that the dip and
> position of the slab is not uniform, I can not come up
> with an analytical expression to define it as a single function for all
> x, y, and z.

Right, but that's also not necessary -- it doesn't have to be an 
analytical expression, it simply needs to be a function where if I give 
you a point (x,y,z), you return to me a velocity (u,v,w). This may very 
well be a velocity that's interpolated between points, or simply the 
velocity from the nearest one of the points for which you know the velocity.

In other words, it just needs to be a function we can evaluate 
everywhere. It doesn't have to be known analytically.

Best
  Wolfgang

-- 
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Wolfgang Bangerth               email:            bangerth at math.tamu.edu
                                 www: http://www.math.tamu.edu/~bangerth/