[CIG-SHORT] Output error with cohesion on faults

[Brad Aagaard]

Bobby,

Yes, I see that the MP4 isn't loading properly. I will look into this. 
Unfortunately, for some reason there doesn't seem to be audio for this 
same tutorial in 2014.

In the meantime, I suggest looking a the slides for the tutorial to help 
guide you through some potential problems. You can also look at the 
slides for the fault friction tutorial, paying attention to the 
tolerances and solver settings.

Regards,
Brad


On 02/22/2016 01:41 PM, Bobak Karimi wrote:
> Hi Brad (and all),
>
> I'm working with Joseph on this problem, and we are running PyLith 2.1.1.
>
> We tried to access session IV (Step 03), but it seems that the youtube link won't work, and the mp4 will not load properly. Is there another host for those video files?
>
> Thank You,
> Bobby Karimi
>
>
>
> -----Original Message-----
> From: CIG-SHORT [mailto:cig-short-bounces at geodynamics.org] On Behalf Of Brad Aagaard
> Sent: Monday, February 22, 2016 4:22 PM
> To: cig-short at geodynamics.org
> Subject: Re: [CIG-SHORT] Output error with cohesion on faults
>
> Joseph,
>
> This sounds like a convergence or tolerance issue. If this is a quasi-static simulation, have you verified that the nonlinear and linear solves are converging at every time step? For an example of how to do this, see Session IV (step03) in the 2015 PyLith Tutorial at https://wiki.geodynamics.org/software:pylith:cdm2015.
>
> If you send another message to the list, please include the version of PyLith you are using and a description of the problem you are running (diagrams are usually very helpful).
>
> Regards,
> Brad
>
>
> On 02/22/2016 01:15 PM, Joseph McCosby wrote:
>> Hello,
>>
>>
>> I've run into a bit of a problem when I apply cohesion to a fault.
>> The displacement output is "wonky". I'm working in a 2D environment,
>> and with cohesion on a fault, the fault blocks begin to overlap, and
>> their displacement magnitude jumps from active at one time step, to
>> the opposite direction in the next. Is there a reason this is
>> happening? When my fault cohesion is 0.0*MPa, this error does not
>> occur.
>>
>>
>> Thank!
>>
>> Joseph "Bodie" McCosby
>>
>> Clarion University of PA
>>
>> Undergraduate Student
>>
>> Dept. Biology & Geosciences
>>
>>
>>
>>
>> _______________________________________________ CIG-SHORT mailing list
>> CIG-SHORT at geodynamics.org
>> http://lists.geodynamics.org/cgi-bin/mailman/listinfo/cig-short
>>
>
> _______________________________________________
> CIG-SHORT mailing list
> CIG-SHORT at geodynamics.org
> http://lists.geodynamics.org/cgi-bin/mailman/listinfo/cig-short
> _______________________________________________
> CIG-SHORT mailing list
> CIG-SHORT at geodynamics.org
> http://lists.geodynamics.org/cgi-bin/mailman/listinfo/cig-short
>