[Jingxue Wang]

Hi，everyone!

I get the result of renolds stress of my calculation, from Uprime2mean0 to 5 . But I am not sure about the true meaning of each. For Uprime2mean0~2,maybe they are u'u',v'v',w'w' because they should be >0. But for Uprime2mean3~5，are they u'v',v'w',u'w'?

Many thanks!

[Jingxue Wang]

Do someboday have idea for this？

Many thanks!

[bentkj]

Hi, I'm not sure on your exact process on how you got those tables but for Reynolds stresses, as an example with simpleFoam, I use the function:

simpleFoam -postProcess -func R -latestTime

This can be expanded to use parallel processing too so:

mpirun -np 36 simpleFoam -parallel -postProcess -func R -latestTime

For transient solutions you'll then have to specify a time range.
You'll get 6 values that are self-explanatory (xx, xy, etc. 6 because the stress matrix is symmetrical which can be accessible through Paraview or similar.

Hope this helps. Good luck!

[LuckyTran]

Originally Posted by Jingxue Wang

But for Uprime2mean3~5，are they u'v',v'w',u'w'?

Not quite. It's u'v', u'w', and v'w'.

Rxx = 0, Ryy = 1, Rzz = 2
Rxy = 3, Rxz = 4, Ryz = 5

Originally Posted by bentkj

You'll get 6 values that are self-explanatory (xx, xy, etc. 6 because the stress matrix is symmetrical which can be accessible through Paraview or similar.

Hope this helps. Good luck!

The question wasn't why there are 6 but how to tell which one is which because OF just gives you 0,1,2,3,4,5.

[bentkj]

Originally Posted by LuckyTran

The question wasn't why there are 6 but how to tell which one is which because OF just gives you 0,1,2,3,4,5.

What I'm trying to say is that if you use the postProcess function R you'll get more self explanatory variables of R:xx, R:yy, R:xy, etc. instead of 0,1,2,... Perhaps a different version of OF uses different names? I'm on 4.1.

And I just mentioned all of those extra stuff with the intention to potentially help others looking to plot stresses. Took me a while figuring it out myself.