[aspect-devel] strain rate corner values and velocity boundary conditions

[Timo Heister]

Okay, this is easy enough to implement. More difficult is finding a
user-friendly to specify this in the parameter file. One way I can
think of would be something of the form

  set Prescribed velocity boundary indicators = 0 x:function,1
y:function,2:function
(where the default is all components).

Can I test this using .prm that you sent in your older email? Your
expectation is that I would get rid of the increased strain rate in
the top left and right corner if I don't specify the y-component on
the sides? Does that sound right?


On Thu, Oct 31, 2013 at 10:37 AM, Glerum, A.C. (Anne) <A.C.Glerum at uu.nl> wrote:
> Hi Timo,
>
> For this particular experiment we would like to prescribe the x-component of
> velocity for the vertical boundaries with a function, but not fix the
> y-component. In general, being able to separately set the velocity component
> boundary conditions on all boundaries would indeed be useful.
>
> Thank you,
>
> Anne
>
> Anne Glerum, MSc | PhD candidate | Department of Earth Sciences | Utrecht
> University|  Budapestlaan 4, 3584 CD Utrecht | Room Z.204 | A.C.Glerum at uu.nl
> |
>
>
>
>
>
> On Oct 31, 2013, at 3:16 PM, Timo Heister wrote:
>
> Dear Anne,
>
> So, my question is, am I correct that right now you have to specify all
> velocity components when prescribing velocity and if so, would you be
> willing to change this?
>
>
> Yes, right now you list a given indicator as zero, tangential,
> prescribed, or not at all and this logic applies to all components. We
> can change this, though.
>
> To make sure I understand you correctly: you want for the bottom to
> prescribe the x-component of the velocity to a certain value (given by
> a function), but not fix the y-component? What about the other
> boundaries?
>
> --
> Timo Heister
> http://www.math.clemson.edu/~heister/
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>
>
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-- 
Timo Heister
http://www.math.clemson.edu/~heister/