gtspring2009:gibson:eq8
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gtspring2009:gibson:eq8 [2009/07/01 09:28] gibson |
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| <html><span style="color:red;font-size:80%;text-align:right;">[the latest posts at the top of this page]</span></html> | <html><span style="color:red;font-size:80%;text-align:right;">[the latest posts at the top of this page]</span></html> | ||
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| + | posts after 2009-07-01 [[:gtspring2009:spieker_blog:itano|are here]] | ||
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| {{gtspring2009:gibson.png?24}} //2009-07-01 12:09 EST// Got an email from Soto Generalis <s.c.generalis@aston.ac.uk>: | {{gtspring2009:gibson.png?24}} //2009-07-01 12:09 EST// Got an email from Soto Generalis <s.c.generalis@aston.ac.uk>: | ||
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| Dear Prof Gibson, | Dear Prof Gibson, | ||
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| We will be in contact soon, | We will be in contact soon, | ||
| Tomoaki Itano and Sotos Generalis. | Tomoaki Itano and Sotos Generalis. | ||
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| + | My response: | ||
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| + | Dear Profs. Itano and Generalis: | ||
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| + | I am glad to hear from you. I certainly understand how busy academic life is! Our EQ7/EQ8 solution has Re_{min} \approx 174 with streamwise,spanwise wavenumbers fixed at alpha. gamma = 1,2, the same as your HVS solution. The lowest value of Re we found was 174.07, but we did not try to determine that precisely. The dissipation vs Reynolds number plot appears to be the same as well. I've attached a figure and some Re vs D data. We have normalized dissipation D == wall shear I so that the laminar solution has D = I = 1. We have also compared the symmetries of our solution to yours, and they are the same (up to phase shifts). So I'm pretty sure the solutions are the same. | ||
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| + | I'm not sure that we need further comparisons, but if you would like to examine our solutions, | ||
| + | the data is available at www.channelflow.org/database in tar-gzip files of ascii data for velocity at Fourier-Chebyshev gridpoints. The data format is explained in detail towards the bottom of the page. The data posted is for alpha=1.14 gamma=2.5; if you would like alpha=1, gamma=2 I can send that to you directly. | ||
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| + | We like your visualization scheme very much. Would you consider sharing your visualization scripts with us, so that we could look at some of our other solutions this way? | ||
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| + | Our paper has been accepted by JFM and should appear in print soon. | ||
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| + | best regards, | ||
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| + | John | ||
| + | ---- | ||
| - | My response | ||
| {{gtspring2009:gibson.png?24}} Their visualization technique is very beautiful. I think you're right (Predrag) about choosing some initial points arbitrarily and then integrating lines tangent to the vorticity field. I would like to try the same for the other solutions. It would be nice to get their scripts. I agree with you on "tertiary" etc. I think "asymptoting to laminar" is probably wrong -that was one of the main points of the Wang, Gibson, Waleffe PRL, at least for the Nagata lower branch. "Mean shear rate" is vague, implies (to me) the temporal mean rather than the time-varying spatial mean. Perhaps just "shear rate". | {{gtspring2009:gibson.png?24}} Their visualization technique is very beautiful. I think you're right (Predrag) about choosing some initial points arbitrarily and then integrating lines tangent to the vorticity field. I would like to try the same for the other solutions. It would be nice to get their scripts. I agree with you on "tertiary" etc. I think "asymptoting to laminar" is probably wrong -that was one of the main points of the Wang, Gibson, Waleffe PRL, at least for the Nagata lower branch. "Mean shear rate" is vague, implies (to me) the temporal mean rather than the time-varying spatial mean. Perhaps just "shear rate". | ||
gtspring2009/gibson/eq8.1246465722.txt.gz ยท Last modified: 2009/07/01 09:28 by gibson
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