[CIG-LONG] Brittle and Ductile deformation

[John Naliboff]

Hello Tatriq,

Could you send both the input file and the Gale error output from when your brittle extension model crashes?  Based on  the first image, I think you are having the same problem I had a few months ago with similar extension models.  I also used a direct solver (MUMPS).    There are a number of emails discussing the problems I had in the February or March 2010 cig-long email records.  Long story short, I think you may need to put a weak low-density layer on top of the crust, which is how I was able to achieve long-term extension with no solver errors.  

Cheers,
John


On Jun 10, 2010, at 7:29 AM, Md. Tariqul Islam wrote:

>  Hi Walter,
> Thanks for your previous help. Now I would like to share some issues with you. One is the brittle deformation. As you mentioned in the user manual that if the crust has both yielding and viscus rheology it should deform half the crust ; but for my case it deformed until Moho and the surface did not subsided enough indicating it could be totally brittle ( attached a strain rate invariant image).
> The other issue ( this is different model) is the change of viscosity - the mantle is showing high viscosity though I used low viscosity ( the input file and image for viscosity field is attached).
> As I am using non Newtonian viscosity it is very sensitive, can you suggest me how it can be consistent as it is crushing around thirty steps. The other thing is I am using the direct solver, do you think that this is making any difference?
> 
> Yours' Sincerely 
> Tatriq 
> University of Sydney, Australia
> <Faulting model.png><mantle viscosity.png><mymodel.xml>_______________________________________________
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