|
[Sponsors] |
Tec Plot Doubt :: Regarding Extract> Precision Line |
![]() |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
![]() |
![]() |
#1 |
New Member
Gujarat
Join Date: Aug 2020
Posts: 5
Rep Power: 6 ![]() |
Hello, I am actually facing trouble in creating an exact line using Extract> Precise Line. I am not able to understand when I try to manually input the coordinates of the line, Tec plot creates a line which is shorter than the specified and also at different locations of the domain.
But when I copy/paste the approx. coordinates by using the probe tool, I can see that the line that it generates is similar to what I want to generate using coordinates I want to specify. For e.g As you can see int the first image, the x coordinate of the line I have specified is around -1.8 but the Tec plot is plotting a line somewhere else. (Image 2) But when I specify the coordinates of two end points of the domain using probe value, I get approximately the line I want to generate. Could you help me to avoid this issue, I don't understand why it is happening. |
|
![]() |
![]() |
![]() |
![]() |
#2 |
Senior Member
Scott Fowler
Join Date: May 2009
Posts: 120
Rep Power: 17 ![]() |
In the first image it appears that the Y-position of the line may be right at the Y-minimum value. In that case there may be numeric precision issues. Do you get the same problem if you increase the Y-position value by a small epsilon?
|
|
![]() |
![]() |
![]() |
![]() |
#3 |
New Member
Gujarat
Join Date: Aug 2020
Posts: 5
Rep Power: 6 ![]() |
@wsfowler Thanks for responding.
Yeah, that's how I am managing to get the line for now. I am just slightly increasing the y value to get the line properly across the wall. Is there any way to limit the precision of Tec-plot to certain digits? Or is this the only way to solve this problem. |
|
![]() |
![]() |
![]() |
![]() |
#4 |
New Member
Gujarat
Join Date: Aug 2020
Posts: 5
Rep Power: 6 ![]() |
@wsfowler Thanks for responding.
Yeah, that's how I am managing to get the line for now. I am just slightly increasing the y value to get the line properly across the wall. Is there any way to limit the precision of Tec-plot to certain digits? Or is this the only way to solve this problem. |
|
![]() |
![]() |
![]() |
![]() |
#5 |
Senior Member
Scott Fowler
Join Date: May 2009
Posts: 120
Rep Power: 17 ![]() |
The way "Extract Precise Line" works is that it effectively does a "Probe" of the data at each point along the line. For the probe to be successful the probed location has to reside within a cell. So setting the Y-value to the exact Y-min will almost always cause a problem. The only reliable solution is to use the small epsilon to ensure the extracted line intersects a cell.
Another option could be to flip to 3D and place a slice, which will result in points extracted from the grid edges, rather than evenly distributed points along a line (which is what extract precise line does). But again, you'll need to ensure the slice is positioned slightly inboard to ensure it cuts through a cell. Hope that helps. |
|
![]() |
![]() |
![]() |
![]() |
#6 |
New Member
Gujarat
Join Date: Aug 2020
Posts: 5
Rep Power: 6 ![]() |
@wsfowler Thanks a lot, it surely helped me a lot.
|
|
![]() |
![]() |
![]() |
Tags |
cfd, please help me, post processing, precision line, tecplot 360 |
|
|
![]() |
||||
Thread | Thread Starter | Forum | Replies | Last Post |
Unknown function type pressureTools | Dorian1504 | OpenFOAM Post-Processing | 23 | May 25, 2021 09:24 |
[Gmsh] Problem with Gmsh | nishant_hull | OpenFOAM Meshing & Mesh Conversion | 23 | August 5, 2015 02:09 |
[blockMesh] non-orthogonal faces and incorrect orientation? | nennbs | OpenFOAM Meshing & Mesh Conversion | 7 | April 17, 2013 05:42 |
OpenFOAM 1.7.1 installation problem on OpenSUSE 11.3 | flakid | OpenFOAM Installation | 16 | December 28, 2010 08:48 |
Problems of Duns Codes! | Martin J | Main CFD Forum | 8 | August 14, 2003 23:19 |