[CIG-SHORT] Gravity, fault opening and fault tractions

[Matthew Knepley]

On Tue, Mar 3, 2015 at 8:43 PM, Ge Li, Mr <ge.li2 at mail.mcgill.ca> wrote:

> Hi Brad,
> How are you? I have some questions about fault opening, gravity and its
> influences on fault tractions.
> Fault opening also occurs when I try to run a slip weakening slip on a
> conical fault. I  take your advice to some researchers that adding
> gravitational body forces to alleviate this phenomenon. After I add gravity
> field without consideration of initial stress and strain into benchmark
> example tpv205 and remove fault traction perturbation settings in original
> models, it seems that fault tractions are not affected by gravity and
> remain zero.
> I cannot figure out why, can you help me with that? Boundary conditions
> used are absorbing boundary conditions.
>

Hi Ge,

  If you give us the .cfg files you are using to run tpv205, we can try it
ourselves. If you could also send the output
that makes you think its not working, that would save us a lot of time.

  Thanks,

     Matt


> Thanks
> Ge
>
> -----邮件原件-----
> 发件人: Brad Aagaard [mailto:baagaard at usgs.gov]
> 发送时间: 2015年2月4日 10:59
> 收件人: Ge Li, Mr
> 抄送: cig-short at geodynamics.org
> 主题: Re: Pylith adaptive time stepping
>
> Ge,
>
> Adaptive time stepping is currently implemented for viscoelastic bulk
> rheologies based on the relaxation time.
>
> See sections 4.2.4.3 and 5.1.4 of the PyLith manual for more information.
>
> Regards,
> Brad
>
> On 02/04/2015 07:18 AM, Ge Li, Mr wrote:
> > Hi Brad,
> >
> > I’m a PhD student at McGill university. These days I’m trying to use
> pylith to do dynamic  simulations of earthquake cycles on a Rate and state
> fault surface driven by remote creeping loading.
> > I have one questions about adaptive time stepping and hope you could
> help me with that.
> >
> >    1.  What’s the algorithm of adaptive time stepping in pylith? Could
> you suggest me some papers about it?
> >
> > Any suggestions will be appreciated and Looking forward to your reply!
> >
> > Ge
> >
>
>
> _______________________________________________
> CIG-SHORT mailing list
> CIG-SHORT at geodynamics.org
> http://lists.geodynamics.org/cgi-bin/mailman/listinfo/cig-short
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.geodynamics.org/pipermail/cig-short/attachments/20150303/071bea5c/attachment.html>