[CIG-LONG] cig-long email list

[Eunseo Choi]

Hi, Garrett

SNAC is a 3D code like Gale so it is supposed to be computationally 
expensive compared to any 2D codes.
I believe this is not what you meant.

As far as I know, the performance of SNAC and Gale has never been 
compared quantitatively yet. Please let me know if it's done even 
qualitatively.
So, I wonder why you have the impression that SNAC is too expensive for 
3D models.

By the way, SNAC can do Mohr-Coulomb plasticity in 3D and doesn't have 
the restriction that plastic flow should always be incompressible.

Eunseo


Garrett Ito wrote:
>
> Hi Mark,
>
>   Good-- I'm glad to see 3D is starting to get a footing in the 
> community.  This is my main reason for using Gale as I already do 
> faulting in 2D with FLAC (and it is my understanding that SNAC is too 
> computationally expensive in 3D ?).  Correction... Mohr-Coulomb has 
> been removed from Gale because it was unstable in 3D and is identical 
> to Drucker-Prager in 2D.
>
> Garrett
>
> ----- Original Message -----
> From: Mark Fleharty <mark.fleharty at gmail.com>
> Date: Wednesday, April 29, 2009 12:46 pm
> Subject: Re: [CIG-LONG] cig-long email list
> To: Garrett Ito <gito at hawaii.edu>
> Cc: cig-long at geodynamics.org
>
> > Garrett,
> >
> > It is good to hear from someone else who is doing 3D simulations in
> > Gale.  I am also doing 3D simulations with Gale. 
> > Welcome aboard.
> >
> > I thought that Mohr-Coulomb doesn't work in Gale in 3D. 
> > Was that
> > something that got fixed?
> >
> > Mark
> >
> > On Wed, Apr 29, 2009 at 4:27 PM, Garrett Ito
> > <gito at hawaii.edu> wrote:
> > >
> > > Dear colleagues,
> > >
> > >   I would like to introduce myself as a new to the cig-long
> > list and new
> > > GALE user.  I would like to encourage us all to use the cig-
> > long list more
> > > often to help spread the knowledge of the CIG codes.  I think
> > it would be
> > > helpful, for example, we made it a practice of sending
> > individual questions
> > > to cig-long along with questions you send to Walter/Eun-seo
> > about the
> > > various coding issues.
> > >
> > > Just to start a conversation...I have started using GALE--
> > really in
> > > collaboration with Walter Landry--over the last half year with
> > interests in
> > > applications of studying faulting and magmatism at mid-ocean
> > ridges in 3D.
> > > A lot of my work to date has been to experimenting with the
> > Mohr-Coulomb,
> > > Drucker-Prager, and StrainWeakening (e.g., damage laws and
> > healing) and
> > > understanding the faulting behavior predicted by Gale. 
> > Recently, we have
> > > started running jobs in 3D, which I have found to be
> > surprisingly cpu
> > > intensive.  I view improving the performance of Gale for 3D faulting
> > > problems as an important goal and on which I will be working
> > closely with
> > > Walter and the Underworld group over the next year.
> > >
> > > I look forward to hearing more from you.
> > >
> > > Garrett
> > > --
> > >
> > > =====================================
> > >
> > > Prof. Garrett Ito
> > >
> > > SOEST, Geology & Geophysics
> > >
> > > 1680 East-West Rd., POST 810
> > >
> > > Univ. of Hawaii
> > >
> > > Honolulu, HI 96822 USA
> > >
> > >
> > >
> > > 808-956-9717
> > >
> > > gito at hawaii.edu
> > >
> > > www.soest.hawaii.edu/GG/FACULTY/ITO
> > >
> > > ======================================
> > >
> > > _______________________________________________
> > > CIG-LONG mailing list
> > > CIG-LONG at geodynamics.org
> > > http://geodynamics.org/cgi-bin/mailman/listinfo/cig-long
> > >
> > >
> >
> >
> >
> > --
> > Mark Fleharty
> > +1 505 217-2089
> ------------------------------------------------------------------------
>
> _______________________________________________
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>   


-- 
=====================================
Eunseo Choi
Post-Doctoral Research Scientist

Lamont-Doherty Earth Observatory
303f Oceanography
P.O. Box 1000
61 Rt. 9W
Palisades, NY 10964-8000

http://www.ldeo.columbia.edu/~echoi
Phone: 845-365-8813 Fax: 845-365-8156
=====================================