CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

Convergence

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   September 21, 2022, 04:07
Smile Convergence
  #1
New Member
 
Mark
Join Date: Sep 2022
Posts: 1
Rep Power: 0
MarkCFDD is on a distinguished road
Hello everyone!
I want to simulate 3D air flow in ANSYS Fluent throught a geometry modeled by me in Fusion360. I prepared a mesh with good quality parameters. The best quality I achieved when I prepare mesh in component in workbench "Mesh" and the next I use function "Make polyhedra" and "Improve mesh quality" in Fluent. Minimum orthogonal quality=0,18.
The boundary conditions: mass flow inlet, outflow outlet and no slip walls. I chose k-e turbulence model.
I upload few photos with solution methods, residuals and testing points.

Can I consider this results to be convergent? Chart with residuals is not constant, but all values are below 1e-4.
Attached Images
File Type: png 1.png (29.9 KB, 4 views)
File Type: png 2.png (50.1 KB, 15 views)
File Type: png 3.png (25.7 KB, 14 views)
File Type: png 4.png (21.2 KB, 13 views)
File Type: png 5.png (25.2 KB, 12 views)
MarkCFDD is offline   Reply With Quote

Old   September 24, 2022, 05:09
Default
  #2
New Member
 
Liu Wenchao
Join Date: Jan 2021
Posts: 14
Rep Power: 3
ChaoLW is on a distinguished road
I vote for "yes".
ChaoLW is offline   Reply With Quote

Old   September 24, 2022, 14:36
Default
  #3
Senior Member
 
Lorenzo Galieti
Join Date: Mar 2018
Posts: 297
Rep Power: 10
LoGaL is on a distinguished road
Continuity below 1e-4 might dictacte not properly converged solution.
Also monitoring area weighted average quantities might be misleading, averages tend to smooth out oscillations.

Can you post a velocity contour of your simulation?
LoGaL is offline   Reply With Quote

Reply

Tags
convergence in fluent, mesh 3d

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Low Mach number wing/body junction convergence Zen SU2 6 May 3, 2019 05:51
CFX overwhelming Fluent in mass convergence of boundary layer separation case Pierre1 FLUENT 7 March 26, 2015 22:43
Convergence of CFX field in FSI analysis nasdak CFX 2 June 29, 2009 02:17
Problems with convergence with an easy system franzdrs Main CFD Forum 0 June 15, 2009 19:17
increasing mesh quality is leading to poor convergence tippo CFX 2 May 5, 2009 11:55


All times are GMT -4. The time now is 13:49.