[CIG-SHORT] Dirichlet displacement-normal boundary condition?

[Matthew Knepley]

On Sat, Jul 13, 2013 at 11:17 AM, Brad Aagaard <baagaard at usgs.gov> wrote:

> Scott,
>
> Specifying a Dirichlet boundary condition using an orientation other than
> the coordinate axes is not implemented. I think you are the first person to
> request this feature. We do have a DirichletBoundary setup that associates
> a boundary mesh with a Dirichlet boundary condition so the orientation
> information could be setup. We will add this to a list of features to
> consider adding in a future release (right now we have several features to
> add that are higher priority).
>

Right now, since you know the normal, you could specify a Cartesian
Dirichlet BC as a stopgap.

   Matt


> Regards,
> Brad
>
>
> On 7/13/13 9:01 AM, Scott Henderson wrote:
>
>> Hello,
>>
>> I'm wondering if it's possible to specify a 'normal displacement'
>> boundary condition along a curved surface in PyLith. For example
>> 'displacement-normal', similar to 'traction-normal' for the Neumann
>> condition.
>>
>> This would be useful to represent fixed volumetric expansion or
>> contraction of a subsurface reservoir (e.g. hydrothermal or magmatic).
>>
>> Thanks,
>> Scott
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