Probe value different than contour!!! CFD-Post bug?

ftab · January 27, 2017, 00:46

Hi all,
I am modeling a case with fluid-porous interface, where the velocity should be around 1e-8. When I plot the velocity contour on the interface, colors pattern make sense but not the legend and color bar (shows to be 0.01). When I put the probe it shows 1.2 e-8, which to me is the correct value. Any one knows why?
On the other hand, on some No slip walls the contour and legend show zero velocity and probe has values of 1e-5. The solution has been well converged with no problem and mesh is well refined.

ghorrocks · January 27, 2017, 16:47

Please show an image of what you are seeing.

ftab · January 31, 2017, 17:25

Quote:

Originally Posted by ghorrocks

Please show an image of what you are seeing.

Hi Glenn,
Thanks for your reply. Here is the link for the image:
https://drive.google.com/open?id=0Bw...kRhc1BuNXZQeWc

As you can see, the probe shows the velocity on the orders of 1e-8, while the legend shows 1e-2.

ghorrocks · January 31, 2017, 17:42

This appears to be related tho this FAQ: https://www.cfd-online.com/Wiki/Ansy...t_the_walls.3F

ftab · February 1, 2017, 10:47

Quote:

Originally Posted by ghorrocks

This appears to be related tho this FAQ: https://www.cfd-online.com/Wiki/Ansy...t_the_walls.3F

I am afraid it is not Glenn.
Switching between HYBRID and CONSERVATIVE options in advanced setting of contour, I still see the velocity in the range of 1e-2, which is far different from 1e-8 the probe corectly shows.
I want to mention again that the problem is on the interface of fluid-porous. Probe prints the correct value, contour plot not (both Hybrid and conservative)

turbo · February 1, 2017, 11:11

Why don't you export those data on the face to check physically?

bietchetlien1995 · April 16, 2020, 00:57

Hi!
Perhaps it's been a long time, but do you know how to solve it?

January 27, 2017, 00:46	Probe value different than contour!!! CFD-Post bug?	#1
ftab Member Ftab Join Date: Sep 2011 Posts: 87 Rep Power: 15	Hi all, I am modeling a case with fluid-porous interface, where the velocity should be around 1e-8. When I plot the velocity contour on the interface, colors pattern make sense but not the legend and color bar (shows to be 0.01). When I put the probe it shows 1.2 e-8, which to me is the correct value. Any one knows why? On the other hand, on some No slip walls the contour and legend show zero velocity and probe has values of 1e-5. The solution has been well converged with no problem and mesh is well refined.

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January 27, 2017, 16:47		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	Please show an image of what you are seeing.

January 31, 2017, 17:42		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,852 Rep Power: 144	This appears to be related tho this FAQ: https://www.cfd-online.com/Wiki/Ansy...t_the_walls.3F

February 1, 2017, 11:11		#6
turbo Senior Member Join Date: Jun 2009 Posts: 174 Rep Power: 17	Why don't you export those data on the face to check physically?

April 16, 2020, 00:57		#7
bietchetlien1995 New Member Michael Fily Join Date: Feb 2019 Posts: 24 Rep Power: 7	Hi! Perhaps it's been a long time, but do you know how to solve it?