[CIG-SHORT] [EXTERNAL] Re: defining fault_edge nodes

[Niloufar Abolfathian]

Hi,

I had another question regarding reading the output files. I am using
matlab for reading the h5 files and further plottings.
For reading stress and strain related to each material I do have the
stress/strain regarding each gird cell plus the topology information (only
number of vertices not the geometrical values). I could not figure out how
to relate the topology cells with the geometrical vertices.

Thanks,
Niloufar


On Thu, Jun 21, 2018 at 7:14 PM, Brad Aagaard <baagaard at usgs.gov> wrote:

> On 6/21/18 5:50 PM, Niloufar Abolfathian wrote:
>
>> 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?
>>
>
> Yes, that is correct.
>
>
>
>>
>> On Thu, Jun 21, 2018 at 5:40 PM, Brad Aagaard <baagaard at usgs.gov <mailto:
>> 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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