[Dan1788]

Hello,

I am doing an LES of a pipe flow using OpenFoam 2.2.x . My question is that whenever I look at contours on slices, the "start/end slice" in the "show derived objects -> slices" is always a few units away from the actual inlet/outlet, as shown in this figure. Why is this so ??



Where as when I drag the slice to the actual "inlet" and "outlet" location, it looks like this:



Shouldnt the inlet and outlet be a colored contour like the mid-slice ??

I ask this because after my LES of pipe simulation, I will map the turbulence at my outlet to the outlet of a jet for a reacting flow calculation and I want the actual turbulence, not the one that shows up in the figure above.

Is this just a graphical issue or is there something wrong with the calculation? Would be really grateful if anyone could let me know. Thanks!

[Durrell4]

Hi Dan,

If you use the probe tool and probe the inlet and outlet do the values of W correspond to what is shown in the second image in you post? My guess is that the contours on the inlet and outlet are accurately being colored.

I could take a look if you upload the data to ftp://ftp.tecplot.com/misc/ and see if I can trouble shoot the results. Are you loading the data using the OpenFOAM loader or are you converting to Tecplot via OpenFOAM to create a *.plt file.

Let me know what you learn and I can see if I can help.

Best

Durrell

[Dan1788]

Hi Durrell,

Thanks so much for your reply. As you asked, I checked the velocities using the "probe" tool at the end of the pipe and the results are consistent with mid-slices. Following are the velocities at 5 locations I checked:

(x y z)                  (Ux Uy Uz)
(0 0 0.075)              (0.717598 -0.302497 12.6124)             
(0 0.001 0.075)          (0.778587 -0.404296 11.4304)             
(0 0.002 0.075)          (-0.287753 -0.381464 10.5165)             
(0 0.003 0.075)          (-0.568692 -0.21863 9.04931)             
(0 0.004 0.075)          (0.164574 -0.621398 9.49656)             
(0 0.005 0.075)          (0.565432 -0.716736 10.5363)

I did the same test to the channel395 tutorial which is already available on OpenFoam. When I look at the slice contour it appears to be something like this:



Please let me know why this is ? Also how do I upload my data to the link you gave me ? Thanks

[Durrell4]

Hi Dan,

ftp://ftp.tecplot.com/misc/ can be opened in a web browser or just use "FileZilla" and connect to ftp.tecplot.com

As soon as the files are there I will see if I can nail down the issue.

Durrell