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Post processing slice files for periodic pipe flow |
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December 11, 2014, 22:15 |
Post processing slice files for periodic pipe flow
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#1 |
Member
Daniel
Join Date: Jun 2014
Posts: 60
Rep Power: 12 |
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! |
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December 12, 2014, 17:02 |
Probe the inlet and outlet using the probe tool to confirm the data are correct
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#2 |
Member
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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 |
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December 13, 2014, 01:45 |
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#3 |
Member
Daniel
Join Date: Jun 2014
Posts: 60
Rep Power: 12 |
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: Code:
(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) Please let me know why this is ? Also how do I upload my data to the link you gave me ? Thanks |
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December 16, 2014, 20:26 |
Uploading files
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#4 |
Member
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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 |
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