[CIG-SHORT] pylith-2.1 one.way coupled to a reservoir simulator

Charles Williams willic3 at gmail.com
Thu Oct 27 14:04:55 PDT 2016

Dear Alberto,

Are you using the stresses to control a bulk rheology (e.g., elastoplastic), or fault rheology?  Also, since this is one-way coupling, I’m assuming the fluid pressure is changing independently of the deformation — correct?  It seems to me it might be possible to use time-varying tractions for faults if that’s what you’re doing.  Otherwise, you may have to do as you say.


> On 28/10/2016, at 6:31 AM, alberto cominelli <alberto.cominelli at gmail.com> wrote:
> Dear All,
> I am willing to run pylith and a eservoir simulator in a one-wat coupled mode (fluid pressure is used to compute stress and deformation).
> In other simulator like abaqus I can use porous elements and then freeze the pressure at the nodes. Then Abaqus solves for displacements and give an effective stress which equlibrated gravity (including density) and pressure which can be considered as a load. 
> In pylith I think I should use initial stress and then pass to Pylith  as initial stress  sigma  + p (with sigma negative and p positive).
> Am I correct doing this? If so, I suppose I can not advance in time in a single simulation but, if I want to use pressure values computed at time 0, time 1 year, time 2 years.. I have to run  a new pylith quasi-static simulations using  at time n+1 new pressure in an incremental manner on top of the stress calculated at the end of time step n.
> I would like to have an opinion from you.
> Regards,
> Alberto.
> P.S: for one way coupling I would prefer to use the code as it is w/o modifications.
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Charles A. Williams
GNS Science
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C.Williams at gns.cri.nz <mailto:C.Williams at gns.cri.nz>
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