<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi Nicolas<div><br></div><div>The dimension of A (the pre-stress constant) is MPa^-n . s^-1, or ... 10^(-6*n) . s^-1; a bit messy and a common source of errors.</div><div><br></div><div>Common values I use for the continental crust: (<span class="Apple-style-span" style="font-size: 12px; ">5 10^-6) .10^-(6*n); for the lower crust: 8 </span><span class="Apple-style-span" style="font-size: 12px; ">.</span><span class="Apple-style-span" style="font-size: 12px; ">10^-(6*n), </span><span class="Apple-style-span" style="font-size: 12px; ">and for the mantle: 70000.</span><span class="Apple-style-span" style="font-size: 12px; ">10^-(6*n)</span></div><div><br></div><div>The scaling factor of A is : (StressScalingFactor^-n) / TimeScalingFactor.</div><div><br></div><div>Cheers</div><div><br></div><div>Patrice</div><div><br></div><div><br></div><div><br><div><div>On 19/08/2010, at 5:00 AM, <a href="mailto:cig-long-request@geodynamics.org">cig-long-request@geodynamics.org</a> wrote:</div><blockquote type="cite"><div><font class="Apple-style-span" color="#000000"><br></font><br>------------------------------<br><br>Message: 3<br>Date: Wed, 18 Aug 2010 17:20:19 +0200<br>From: Nicolas RIEL <<a href="mailto:nicolas.riel@free.fr">nicolas.riel@free.fr</a>><br>Subject: [CIG-LONG] Non-Newtonian rheology scaling !<br>To: <a href="mailto:cig-long@geodynamics.org">cig-long@geodynamics.org</a><br>Message-ID:<br><span class="Apple-tab-span" style="white-space:pre"> </span><<a href="mailto:AANLkTimF7AA1jjOfbcz+QwFTXTpJp-uunMLPp+Jh2Fjn@mail.gmail.com">AANLkTimF7AA1jjOfbcz+QwFTXTpJp-uunMLPp+Jh2Fjn@mail.gmail.com</a>><br>Content-Type: text/plain; charset="iso-8859-1"<br><br>Hi,<br><br>I'm encountering some problems when scaling the "A" (creeping parameter) for<br>the non-newtonian rheology.<br>In gale user manual (2.2.8.2) it is said that the unit of A parameter is *<br>s(-1/n).Pa(-1)<br>*For other authors the unit of this parameter is most of the time in *<br>Pa(-n).s(-1)* or *Pa.s(1/n).*<br><br>I will take an example in order to understand :<br><br><br>A = 262800* Pa.s(1/n)*<br>n = 4*<br><br>*If I want to translate this value for gale, first I have to change the<br>units for *s(-1/n).Pa(-1) *by multplying with ^(-1) ?<br><br>Then A unscaled becomes for gale 262800^(-1) = 3.8051e-6<br><br>Based on that and following gale user manual A scaled for gale is 3.8051e-6<br>* (10e25)^(1/n) = 6.7574<br>However in the dyke example the scaling of A is around 1e-12.<br><br>I'm wondering if there a mistake for the given scaling equation. Maybe this<br>equation should be Anew = Aold(10e25)^(-1/n) ?<br><br>When I use this, I obtain Anew = 2.1368e-12 and this works<br><br>Do you have any suggestions about this ?<br><br>Nicolas Riel<br>-------------- next part --------------<br>An HTML attachment was scrubbed...<br>URL: <a href="http://geodynamics.org/pipermail/cig-long/attachments/20100818/a12b49f2/attachment.html">http://geodynamics.org/pipermail/cig-long/attachments/20100818/a12b49f2/attachment.html</a> <br><br>------------------------------<br><br>_______________________________________________<br>CIG-LONG mailing list<br><a href="mailto:CIG-LONG@geodynamics.org">CIG-LONG@geodynamics.org</a><br>http://geodynamics.org/cgi-bin/mailman/listinfo/cig-long<br><br><br>End of CIG-LONG Digest, Vol 45, Issue 12<br>****************************************<br></div></blockquote></div><br><div>
<div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: medium; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><div><div>Associate Professor Patrice F. Rey</div><div>EarthByte Research Group</div><div>School of Geosciences</div><div>The University of Sydney</div><div>+61 2 9351 2067</div><div><a href="mailto:patrice.rey@mac.com">patrice.rey@mac.com</a></div><div><div><a href="mailto:patrice.rey@sydney.edu.au">patrice.rey@sydney.edu.au</a></div></div></div></div></div></span><br class="Apple-interchange-newline"></div></span><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"></div><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">
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