[ANSYS Meshing] tolerance of geometry is large. How to reduce?

foolboy007 · October 15, 2012, 11:35

I got a warning from ANSYS meshing:
The tolerance of the geometry is larger than the applied tessellation refinement tolerance. This might lead to an uneven mesh and/or to poor geometric accuracy of the mesh.

the min mesh size was 2e-5 so I can get y+~1.
the geometry was built in workbench DM.
is there a way to modify the default tolerance of the geometry?

Umberto · January 28, 2014, 12:17

Did you manage to solve this problem eventually?

Farid · May 19, 2014, 15:20

I ran into same problem and with refining mesh, it was solve.

cfdan · January 21, 2015, 04:31

refining mesh as in reducing local min size?

Farid · January 23, 2015, 10:44

Sometimes it helps,

1. Click on the name of your geometry on the top of the modeling tree. -> Change "Model tolerance" to "Tight".

2. For curvatures tone "Facet qualities" to higher value.

hazimhalimi · February 23, 2015, 23:31

i cant find the model tolerance settings (note that i am using ansys fluent).

can you guide me to solve the proposed problem?
"The tolerance of the geometry is larger than the applied tessellation refinement tolerance. This might lead to an uneven mesh and/or to poor geometric accuracy of the mesh."

hazimhalimi · February 24, 2015, 19:04

Quote:

Originally Posted by Farid

Sometimes it helps,

1. Click on the name of your geometry on the top of the modeling tree. -> Change "Model tolerance" to "Tight".

2. For curvatures tone "Facet qualities" to higher value.

i cant find the model tolerance settings (note that i am using ansys fluent).
where can i find that option on ansys fluent?

can you guide me to solve the proposed problem?
"The tolerance of the geometry is larger than the applied tessellation refinement tolerance. This might lead to an uneven mesh and/or to poor geometric accuracy of the mesh."

Farid · March 9, 2015, 10:02

I have no idea to change the tolerance in fluent. What I wrote in the previous post is for Design modeler. The tree outline of the geometry on the left hand side. Just click on the very first line. In table of details view, you would see "Model Tolerance"

hazimhalimi · March 9, 2015, 12:04

i got it already. thank you farid.
i also fix the proximity angle and the tolerance is smaller and better.

mipt_khoi · April 15, 2015, 10:12

Could you post pictures of fixing this error? I don't find how to change Model tolerance. Thanks!

hazimhalimi · April 16, 2015, 13:56

Quote:

Originally Posted by mipt_khoi

Could you post pictures of fixing this error? I don't find how to change Model tolerance. Thanks!

i dint change the model tolerance.
i just reduce the Curvature Normal Angle.

steps:
mesh>sizing>curvature normal angle

Oula · January 28, 2016, 13:49

Quote:

Originally Posted by Farid

Sometimes it helps,

1. Click on the name of your geometry on the top of the modeling tree. -> Change "Model tolerance" to "Tight".

2. For curvatures tone "Facet qualities" to higher value.

Dear Fraid, your answer to this thread helped me alot. I have only one question to you. Does changing the model tolerance affect the geometry dimensions or any thing else?. I got issue that the dimensions of my geometry in fluent differ a lot. I have noticed that when creating plans

Thank you in advance for your helo

vidyadhar · September 15, 2019, 03:17

Hello,

I could solve the problem by setting the Tesselation Refinement value to "NONE" as mentioned in the post here: https://studentcommunity.ansys.com/t...n-refinement-/

Thanks & Regards,
vidyadhar

October 15, 2012, 11:35	tolerance of geometry is large. How to reduce?	#1
foolboy007 New Member Guan Join Date: Dec 2011 Location: US Posts: 25 Rep Power: 14	I got a warning from ANSYS meshing: The tolerance of the geometry is larger than the applied tessellation refinement tolerance. This might lead to an uneven mesh and/or to poor geometric accuracy of the mesh. the min mesh size was 2e-5 so I can get y+~1. the geometry was built in workbench DM. is there a way to modify the default tolerance of the geometry? Last edited by foolboy007; October 15, 2012 at 22:30.

January 23, 2015, 10:44		#5
Farid New Member Join Date: Apr 2014 Posts: 13 Rep Power: 12	Sometimes it helps, 1. Click on the name of your geometry on the top of the modeling tree. -> Change "Model tolerance" to "Tight". 2. For curvatures tone "Facet qualities" to higher value. hazimhalimi likes this.

September 15, 2019, 03:17	Solution from ANSYS student community	#13
vidyadhar Senior Member vidyadhar Join Date: Jul 2016 Posts: 138 Rep Power: 9	Hello, I could solve the problem by setting the Tesselation Refinement value to "NONE" as mentioned in the post here: https://studentcommunity.ansys.com/t...n-refinement-/ Thanks & Regards, vidyadhar

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January 28, 2014, 12:17		#2
Umberto New Member Join Date: Oct 2012 Posts: 5 Rep Power: 13	Did you manage to solve this problem eventually?

May 19, 2014, 15:20		#3
Farid New Member Join Date: Apr 2014 Posts: 13 Rep Power: 12	I ran into same problem and with refining mesh, it was solve.

January 21, 2015, 04:31		#4
cfdan New Member Join Date: Sep 2012 Posts: 23 Rep Power: 13	refining mesh as in reducing local min size?

February 23, 2015, 23:31		#6
hazimhalimi New Member muhammad hazim bin mohd halimi Join Date: Feb 2015 Posts: 4 Rep Power: 11	i cant find the model tolerance settings (note that i am using ansys fluent). can you guide me to solve the proposed problem? "The tolerance of the geometry is larger than the applied tessellation refinement tolerance. This might lead to an uneven mesh and/or to poor geometric accuracy of the mesh."

March 9, 2015, 10:02		#8
Farid New Member Join Date: Apr 2014 Posts: 13 Rep Power: 12	I have no idea to change the tolerance in fluent. What I wrote in the previous post is for Design modeler. The tree outline of the geometry on the left hand side. Just click on the very first line. In table of details view, you would see "Model Tolerance"

March 9, 2015, 12:04		#9
hazimhalimi New Member muhammad hazim bin mohd halimi Join Date: Feb 2015 Posts: 4 Rep Power: 11	i got it already. thank you farid. i also fix the proximity angle and the tolerance is smaller and better.

April 15, 2015, 10:12		#10
mipt_khoi New Member khoibuivan Join Date: Jan 2014 Posts: 1 Rep Power: 0	Could you post pictures of fixing this error? I don't find how to change Model tolerance. Thanks!