[FMDenaro]

Originally Posted by huangxianbei

Hi,Filippo:
I got stuck in the post-process again and need your help. I'm calculating the two-point correlation in the channel flow DNS. As you say, if the direction is homogenous, any choice of the x will get the same result, so I only need to calculate it with a chosen x, right?
I calculate it by choosing x=0 and average with 300 samples, but the curve is not smooth at all! The deltaT=0.0065h/ut, everything is in good agreement with Moin's data but this one.

did you performed the statistical average of correlations along the z (spanwise values), but what about the position y in the channel height?
Please, show a figure with the comparison ...

[huangxianbei]

Originally Posted by FMDenaro

did you performed the statistical average of correlations along the z (spanwise values), but what about the position y in the channel height?
Please, show a figure with the comparison ...

Yes,In my previous thread, I listed my steps and you can see in step 3.
y+=5,
Here is my result

And here is Moin's result