[CIG-LONG] CIG-LONG Digest, Vol 48, Issue 2

[Patrice Rey]

G'day Walter

I experimented with Nico's input file, (adding Stokes flow by pulling slightly on the left, playing with maxTImeStep and dtfactor, defaultDiffusivity etc.). 

I ended up having the same temperature evolution on the high and low diffusivity embedding material.

So far, I don't think I managed to get a model in which I am confident about the temperature evolution. For models with small and/or variable Peclet number this is a worry.

Cheers

patrice



On 04/11/2010, at 3:57 AM, cig-long-request at geodynamics.org wrote:

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>   1. Diffusivity problem in Gale (Nicolas RIEL)
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> Message: 1
> Date: Wed, 3 Nov 2010 17:57:19 +0100
> From: Nicolas RIEL <nicolas.riel at free.fr>
> Subject: [CIG-LONG] Diffusivity problem in Gale
> To: cig-long at geodynamics.org
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> 	<AANLkTimKwbb3b-m2VuJyMer4zDJNc_XsfBYhQk48mNft at mail.gmail.com>
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> 
> Hi Walter,
> Following our last conversation about diffusivity, I corrected the timestep
> for the thermal diffusivity and it fixed the abnormal temperature values
> that I had.
> However after runing some tests it appears that diffusivity is constant in
> gale and set to a specific value. Indeed, when I change the diffusivity
> value in the input file (with defaultdiffusivity line removed) nothing
> changes in the run. Also, as Patrice told me for my input file, when
> diffusivity is set to 0, heat is still conducted.
> Is there something wrong in my input file or it is the code ?
> 
> I attached my input file
> 
> Cheers
> 
> Nicolas
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Associate Professor Patrice F. Rey
EarthByte Research Group
School of Geosciences
The University of Sydney
+61 2 9351 2067
patrice.rey at mac.com
patrice.rey at sydney.edu.au