|
[Sponsors] |
How to find cells whose skewness exceed 0.98 in Fluent? |
|
LinkBack | Thread Tools | Search this Thread | Display Modes |
August 8, 2014, 02:50 |
How to find cells whose skewness exceed 0.98 in Fluent?
|
#1 |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Hi all!
I made a grid and imported it in fluent and checked case before running calculation But an error occurred as follows: Skewness exceeded 0.98 at 3 cells on thread ID = 2. I want to know the coordinates of these cells in Fluent in order to correct How should I do? or, is there another easier way to correct it? Thanks in advance!
__________________
Best regards |
|
August 8, 2014, 05:37 |
|
#2 |
Senior Member
Cees Haringa
Join Date: May 2013
Location: Delft
Posts: 607
Rep Power: 0 |
Hi,
There are a few things you could do. Of course, you could go back to your mesher, check the cells out there, and restructure your mesh in the affected area. This is the advisable solution, because it allows you the most control over what happens to your mesh. Another option is to fix it in FLUENT itself. You can use adapt/iso-value to select cells that have a skewness or quality value below a certain treshold. Clicking `adapt' will cause fluent to remesh this cells with a finer mesh, which may take away the problem (but it is not guaranteed to do so). Hope that helps! Cees |
|
August 8, 2014, 10:23 |
|
#3 |
Senior Member
Joe
Join Date: Feb 2012
Location: Canada
Posts: 111
Rep Power: 14 |
Sangwoo,
I suggest to fix it in mesh section(before import it in Fluent) In mesh, go to mesh and then click on Statistics and then open the skewness tab and then see where are the worst elements and then try to have a better mesh there Good Luck, Hooman |
|
August 10, 2014, 21:54 |
|
#4 | |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Quote:
Thank you for your suggestion! I will try and leave a feedback.
__________________
Best regards |
||
August 10, 2014, 21:57 |
|
#5 | |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Quote:
You mean in ICEM? I don't know about statistics option. Unfortunately I use pointwise and I have never been using ICEM...
__________________
Best regards |
||
August 10, 2014, 22:14 |
|
#6 | |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Quote:
Iso-value is not activated in Adapt tab.. What can I do?
__________________
Best regards |
||
August 11, 2014, 02:45 |
|
#7 | |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Quote:
But How can I remesh? Can you explain more detailed procedure?
__________________
Best regards |
||
August 11, 2014, 05:05 |
|
#8 |
Senior Member
Cees Haringa
Join Date: May 2013
Location: Delft
Posts: 607
Rep Power: 0 |
I think you need to do 1 iteration before it becomes available.
Then go to adapt -> iso value -> mesh there you can select the property you want to adapt; so skewness, orthogonal quality, etcetera. If you click `compute' the minimum and maximum value of the property in the domain are shown. Then you can set the minimum and maximum bounds; the setup will select all cells between these bounds. For example, you can set skewness with min 0.7 and max 1.0 to select all cells with a skewness bigger than 0.7. Click adapt to remesh them. But again; it would be better to go back to your meshing programme and adapt the mesh there rather than in fluent if that is a possibility for you. |
|
August 11, 2014, 05:29 |
|
#9 |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Thank you very much!
I will try. I want to adapt in fluent because doing it in mesher is too difficult... I needed some automatic function lol I wish it works
__________________
Best regards |
|
August 11, 2014, 20:13 |
|
#10 |
Senior Member
Joe
Join Date: Feb 2012
Location: Canada
Posts: 111
Rep Power: 14 |
Sangwoo,
No I meant in workbench-->Fluid Flow-->Mesh--> and the rest of my suggestion. Hooman |
|
March 4, 2017, 12:56 |
|
#11 |
New Member
Balli
Join Date: Nov 2016
Posts: 5
Rep Power: 9 |
I also have the same problem.
error occurs: Skewness exceeded 0.98 at 3 cells on thread ID = 2. I followed the above answer but didn't solution. I did meshing in fluent.I have no ideas why this error occurs. Much Thanks in advance. Balli |
|
March 4, 2017, 23:09 |
|
#12 | |
Senior Member
Sangwoo Kim
Join Date: Jul 2014
Location: Seoul, South Korea
Posts: 115
Rep Power: 11 |
Quote:
It is warning that the quality of your mesh is too poor. Did you try Cees's comment and Joe's? I have not worked with Fluent Meshing, so I have no idea about it. I remember that I eventually fixed the problem in meshing tool manually at that time. That is, I found the troublesome cell, and adjusted the node manually until the skewness fell down. It was cumbersome but the only way that I could do. This is possible in Pointwise, but I'm not sure about Fluent Meshing or ICEM.
__________________
Best regards |
||
March 5, 2017, 09:31 |
|
#13 |
Senior Member
Joe
Join Date: Feb 2012
Location: Canada
Posts: 111
Rep Power: 14 |
Try to re-mesh in Ansys Meshing...
There are ways to decrease the skewness in Fluent as well. |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Foam::error::PrintStack | almir | OpenFOAM Running, Solving & CFD | 91 | December 21, 2022 04:50 |
Problem with divergence | TDK | FLUENT | 13 | December 14, 2018 06:00 |
snappyhexmesh remove blockmesh geometry | philipp1 | OpenFOAM Running, Solving & CFD | 2 | December 12, 2014 10:58 |
[ICEM] Cells have only wall faces error in Fluent | Sparsh6 | ANSYS Meshing & Geometry | 0 | March 18, 2014 05:31 |
CFX problem in ubuntu (linux) | Vigneshramaero | CFX | 0 | July 13, 2012 10:22 |