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Dear Walter and Guillaume,<br>
<br>
Thank you very much and I am sorry I cannot response quickly.<br>
<br>
Guillaume, <br>
I could understand the scaling law of the NonNewtonian in Gale and can
use values from the papers. Thanks a lot!<br>
<br>
Walter,<br>
I submerged the dike 1000 and 2000 m deep from the surface, but after
several time steps proceed, the dike hill appears. <br>
<br>
Sincerely,<br>
<br>
Taichi<br>
<br>
(2010/05/09 8:21), <a class="moz-txt-link-abbreviated" href="mailto:Guillaume.Duclaux@csiro.au">Guillaume.Duclaux@csiro.au</a> wrote:
<blockquote
cite="mid:F208C10EED02964CB3F9014E661F55024F11FF1A80@EXWA-MBX01.nexus.csiro.au"
type="cite">
<pre wrap="">In the literature A is usually expressed in MPa^(-n).s^(-1), consequently it need to be scaled:
Agale= A^(1/n)*timeScalingFactor^(1/n)
I've been using values from Ranalli 1997, and for a quartz, A=1e-3 MPa^(-n).s^(-1), n=2, Ea=167 kJ.mol^(-1). No 1e-16 in my recent scripts, though.
Attached is a basic scaling spreadsheet I prepared for scaling the input parameters for the NonNewtonian viscosity implementation in Gale.
How it works: Fill the cells in orange (Edot, n, scalingFactor, A, Ea) and get T_0 and A_Gale (in red) scaled for the input file...
Use it at your own risks! I don't guarantee the correctness of the script.
If you still want to use it and find an error, please let me know ;)
Cheers
Gilly
________________________________________________
Dr Guillaume Duclaux
CSIRO Earth Science and Resource Engineering
Visiting address: ARRC, 26 Dick Perry Av., Kensington WA 6151
Postal address: PO Box 1130, Bentley WA 6102, Australia
Ph: + 61 8 6436 8728 Fax: + 61 8 6436 8555 Web: <a class="moz-txt-link-abbreviated" href="http://www.csiro.au">www.csiro.au</a>
-----Original Message-----
From: <a class="moz-txt-link-abbreviated" href="mailto:cig-long-bounces@geodynamics.org">cig-long-bounces@geodynamics.org</a> [<a class="moz-txt-link-freetext" href="mailto:cig-long-bounces@geodynamics.org">mailto:cig-long-bounces@geodynamics.org</a>] On Behalf Of Walter Landry
Sent: Saturday, 8 May 2010 7:18 AM
To: <a class="moz-txt-link-abbreviated" href="mailto:cig-long@geodynamics.org">cig-long@geodynamics.org</a>
Subject: Re: [CIG-LONG] Low viscosity material around dike
<a class="moz-txt-link-rfc2396E" href="mailto:Guillaume.Duclaux@csiro.au"><Guillaume.Duclaux@csiro.au></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Folks,
I'm currently out of office and I didn't bring my scaling scripts
with me... The NewNewtonian rheology in Gale implies some scaling
(in order to obtain an effective viscosity of the order of one), you
can't directly use values from the literature.
</pre>
</blockquote>
<pre wrap="">
The scaling for A is fairly straighforward. The units for A are
1/viscosity, so you scale A inversely to what you scale viscosity.
What I do not know (and what I think Taichi is asking) is where did
the original numbers come from. What is the original paper that you
got the numbers from? Presumably people will want to use their own
numbers for their own runs, but it would be nice to know where the
example numbers come from.
Thanks,
Walter Landry
<a class="moz-txt-link-abbreviated" href="mailto:walter@geodynamics.org">walter@geodynamics.org</a>
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<pre wrap="">
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</blockquote>
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