Hi Jean-Christophe, This examples forces Nek5000 to output into the file blah.sch a time trace (H) of pressure (P), x & y velocity components (UV) for a point located in the element w/ global number IEL and collocation coordinates I,J K. Use 'grep History logfile' to get coordinates of the points. Aleks ----- Original Message ----- From: [email protected] To: [email protected] Sent: Wednesday, May 5, 2010 12:22:03 PM GMT -06:00 US/Canada Central Subject: [Nek5000-users] History points Hello Nek's, I have a few questions on how to use the history points. I have seen on the wiki the following stuff: History points Specify grid points to monitor the specified variables in time. Example: ***** HISTORY AND INTEGRAL DATA ***** 1 POINTS. Var, Hcode, I, J, K, IEL UV P H 2 2 1 4 NOTE: • Make sure LHIS in SIZEu is large enough I bet Var stands for variable, but what do Hcode, I, J, K, and IEL stand for ? Once you have specified the location of your history point, let's say a point on the centerline of a stenotic flow at whatever streamwise station, how do you get the data concerning this history point? Do you have to change anything else in the output specification section ? I have tried to add the wiki lines up there directly in my blah.rea but once I ran the code I did not get any new files other than the expected blah.fld's. Regards, Jean-Christophe _______________________________________________ Nek5000-users mailing list [email protected] https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users
Hi Aleks, One question; what exactly is 'grep History logfile'? Cheers, Frank On Wed, 2010-05-05 at 15:17 -0500, [email protected] wrote:
Hi Jean-Christophe,
This examples forces Nek5000 to output into the file blah.sch a time trace (H) of pressure (P), x & y velocity components (UV) for a point located in the element w/ global number IEL and collocation coordinates I,J K.
Use 'grep History logfile' to get coordinates of the points.
Aleks
----- Original Message ----- From: [email protected] To: [email protected] Sent: Wednesday, May 5, 2010 12:22:03 PM GMT -06:00 US/Canada Central Subject: [Nek5000-users] History points
Hello Nek's,
I have a few questions on how to use the history points. I have seen on the wiki the following stuff:
History points
Specify grid points to monitor the specified variables in time. Example: ***** HISTORY AND INTEGRAL DATA ***** 1 POINTS. Var, Hcode, I, J, K, IEL UV P H 2 2 1 4
NOTE:
• Make sure LHIS in SIZEu is large enough I bet Var stands for variable, but what do Hcode, I, J, K, and IEL stand for ?
Once you have specified the location of your history point, let's say a point on the centerline of a stenotic flow at whatever streamwise station, how do you get the data concerning this history point? Do you have to change anything else in the output specification section ? I have tried to add the wiki lines up there directly in my blah.rea but once I ran the code I did not get any new files other than the expected blah.fld's.
Regards, Jean-Christophe
_______________________________________________ Nek5000-users mailing list [email protected] https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users _______________________________________________ Nek5000-users mailing list [email protected] https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users -- Frank Herbert Muldoon, Ph.D. Mechanical Engineering Technische Universität Wien (Technical University of Vienna) Inst. f. Strömungsmechanik und Wärmeübertragung (Institute of Fluid Mechanics and Heat Transfer) Resselgasse 3 1040 Wien Tel: +4315880132232 Fax: +4315880132299 Cell:+436765203470 fmuldoo (skype) http://tetra.fluid.tuwien.ac.at/fmuldoo/public_html/webpage/frank-muldoon.ht...
Thanks Aleks. Concerning grep, it is a linux command that searches for the string History in the logfile.
Hi Aleks, My question is what is the logfile? Perhaps you mean the output that NEK writes to the screen? If so, then one would know the location of the point at which data is being dumped only after entering the i,j,k and element # of the point in the *.rea file.... Cheers, Frank On Wed, 2010-05-05 at 23:37 +0200, [email protected] wrote:
Thanks Aleks. Concerning grep, it is a linux command that searches for the string History in the logfile. _______________________________________________ Nek5000-users mailing list [email protected] https://lists.mcs.anl.gov/mailman/listinfo/nek5000-users -- Frank Herbert Muldoon, Ph.D. Mechanical Engineering Technische Universität Wien (Technical University of Vienna) Inst. f. Strömungsmechanik und Wärmeübertragung (Institute of Fluid Mechanics and Heat Transfer) Resselgasse 3 1040 Wien Tel: +4315880132232 Fax: +4315880132299 Cell:+436765203470 fmuldoo (skype) http://tetra.fluid.tuwien.ac.at/fmuldoo/public_html/webpage/frank-muldoon.ht...
I ran the stenosis example adding the following lines to the .rea file:
***** HISTORY AND INTEGRAL DATA ***** 1 POINTS. Var, Hcode, I,J,K,IEL UV P H 1 1 1 50 At the moment I do not really care about where is my probe, I just want to learn how to use it that's all. But eventhough I swith HSTEP to a positive value, nothing is written in the .sch file. Did I make something wrong or forgot to switch something on ? O.o
Regards, Jean-Christophe
Jean-Christoph, Because the history points line contains characters, it is essential to match the format for that particular line. The UV P H and integers must lie in the specified columns. For 3D, a typical line would be: UVWPT H 1 1 6 228 Paul On Thu, 6 May 2010, [email protected] wrote:
I ran the stenosis example adding the following lines to the .rea file:
***** HISTORY AND INTEGRAL DATA ***** 1 POINTS. Var, Hcode, I,J,K,IEL UV P H 1 1 1 50 At the moment I do not really care about where is my probe, I just want to learn how to use it that's all. But eventhough I swith HSTEP to a positive value, nothing is written in the .sch file. Did I make something wrong or forgot to switch something on ? O.o
Regards, Jean-Christophe
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