[CIG-SHORT] Output error with cohesion on faults

Bobak Karimi bkarimi at clarion.edu
Tue Feb 23 10:51:06 PST 2016


Hi Brad,

Yes, I got it working on my computer. Thank you!

Bobby


-----Original Message-----
From: CIG-SHORT [mailto:cig-short-bounces at geodynamics.org] On Behalf Of Brad Aagaard
Sent: Tuesday, February 23, 2016 12:28 PM
To: cig-short at geodynamics.org
Subject: Re: [CIG-SHORT] Output error with cohesion on faults

Bobby and Joseph,

I uploaded a clean MP4 version of the tutorial video. It is working for me, so please give it a try.

See Session IV (step03) in the 2015 PyLith Tutorial at https://wiki.geodynamics.org/software:pylith:cdm2015.

Regards,
Brad


On 02/22/2016 03:40 PM, Brad Aagaard wrote:
> 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
>>>
>>
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>

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