[aspect-devel] Flow through free surface

[Lev Karatun]

Hi all,

I was wondering if you could give me an idea of how hard it would be to
allow material flow through the free surface? Right now I'm just able to
dampen the elevation change by applying the diffusion equation, but is it
possible to actually take material out of the system? Would the hardest
part be figuring out if a point is inside a curved domain? Or is there an
inherent limitation in Aspect that makes it not feasible in principle?
To rephrase what I mean: is it possible to let the material move at the
surface with Stokes velocity, and then draw the new top boundary on top of
it, getting rid of material that  was eroded away (falls outside of the new
model boundaries), and filling in the now less deep trenches with crustal
material?

Thanks in advance!

Best regards,
Lev Karatun.
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