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-   -   How to plot u+ Vs Y+ graph? (http://www.cfd-online.com/Forums/star-ccm/109473-how-plot-u-vs-y-graph.html)

 TQIM November 19, 2012 02:30

How to plot u+ Vs Y+ graph?

I want to plot a graph between u+ and Y+. I m not able to get a plot, can anyone help me out in this..

Regards
TQIM

 aqua November 19, 2012 06:52

Quote:
 Originally Posted by TQIM (Post 392862) I want to plot a graph between u+ and Y+. I m not able to get a plot, can anyone help me out in this.. Regards TQIM

 triple_r November 19, 2012 11:39

What I usually do is to plot velocity as a function of wall distance (define a line probe to get the plot) and export it to excel, and use excel to non-dimensionalize the plot to get u+ vs y+. You will need the shear stress at the wall though, and you can get it by a point probe, or just using the line probe that you have and plotting the wall shear stress on that line. You will get a single value at the wall and zeros every where else.

 mjthomp3 July 28, 2016 23:24

Quote:
 Originally Posted by triple_r (Post 392999) What I usually do is to plot velocity as a function of wall distance (define a line probe to get the plot) and export it to excel, and use excel to non-dimensionalize the plot to get u+ vs y+. You will need the shear stress at the wall though, and you can get it by a point probe, or just using the line probe that you have and plotting the wall shear stress on that line. You will get a single value at the wall and zeros every where else. I don't know if this answered your question or not.
what else do you do from there? I did what you said so far but am not getting the correct plot.....

 triple_r July 29, 2016 10:46

Quote:
 Originally Posted by mjthomp3 (Post 611893) what else do you do from there? I did what you said so far but am not getting the correct plot.....
What do you get when you follow the steps? Can you give a little bit more detail? I haven't done this for a while now, so can't remember exactly if there were any tricks or something to watch for.

 Paulh July 29, 2016 13:42

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