[CIG-SHORT] defining fault_edge nodes

[Niloufar Abolfathian]

Thanks, Brad. By my second question, I mean in cases where the fault is
extended to the external boundaries, and we want to set boundary conditions
on these surfaces(external boundaries), fault nodes should be all excluded.
Is this statement right?


On Thu, Jun 21, 2018 at 5:40 PM, Brad Aagaard <baagaard at usgs.gov> wrote:

> On 6/21/18 12:38 PM, Niloufar Abolfathian wrote:
>
>> Hi,
>>
>> I am modeling a 3D vertical fault in an upper crust, lying on a lower
>> crust. It is as your 3d/hex example instead of that the fault is only
>> located in the upper crust.  I set up the nodes related to the fault and
>> fault_edge. From my meshing and node selection the fault should only be
>> located in the upper crust, but after running the model the fault is
>> extended below the upper crust. I guess it may be due to the selection of
>> fault and fault_edge nodes. Hope you can help me with this issue.
>>
>> Question: Should the fault_edge nodes be also included in fault nodes? (I
>> suppose the answer is yes, due to the figure 6.4 in the manual.)
>> I tried excluding fault_edge nodes from the fault but then the model will
>> not be converged.
>>
>
> Yes. The fault edge nodes are included in the fault nodes.
>
> The edge nodes are any buried edges of the fault. That is, any nodes on
> edges that are not on the external domain boundary should be included in
> the fault edges.
>
> I have another question. In the example 3d/hex model, if we want to define
>> a boundary condition on y_neg/y_pos , the fault nodes be excluded az z_neg,
>> right?
>>
>
> I don't understand this question.
>
> Regards,
> Brad
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