CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > SU2

non-physical points

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   December 30, 2024, 21:58
Question non-physical points
  #1
New Member
 
李以乐
Join Date: Apr 2024
Posts: 19
Rep Power: 2
lqliang1222 is on a distinguished road
hello everyone,
When I run SU2-NEMO related cases, a warning line will appear on the screen, similar to "Warning. The initial solution contains 100 points that are not physical", and as the number of iterations increases, the non physical points will gradually increase. May I ask what caused this issue and how to handle it? Thank you.
lqliang1222 is offline   Reply With Quote

Old   December 31, 2024, 08:13
Default
  #2
Senior Member
 
bigfoot
Join Date: Dec 2011
Location: Netherlands
Posts: 716
Rep Power: 21
bigfootedrockmidget is on a distinguished road
The solver might be slowly slowly diverging. Sometimes, the nr of unphysical points stabilizes and reduces again until the problem disappears altogether. You might be able to prevent it by using:
- better initial conditions
- different numerical settings, especially lower CFL or timestep values, or switching to a more diffusive numerical scheme


You can visualize the problem in paraview, see where it occurs and maybe you can think about a solution. Sometimes you see that it is a small region in the flow that is slowly being transported with the flow towards the outlet, then the problem will solve itself. This is what we observe often in the incompressible combustion model (flamelet model).
bigfootedrockmidget is offline   Reply With Quote

Reply

Tags
nemo, non-physical points

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
Sample utility bug? For many cloud points in the sampleDict, some are neglected! brandius OpenFOAM Post-Processing 10 August 22, 2022 10:56
[Gmsh] Cannot transfer physical surfaces to patches inside the boundary file celestial OpenFOAM Meshing & Mesh Conversion 3 November 25, 2019 16:58
[snappyHexMesh] .STL: non-closed manifold surface giulio.topazio OpenFOAM Meshing & Mesh Conversion 32 November 25, 2016 04:15
[snappyHexMesh] No layers in a small gap bobburnquist OpenFOAM Meshing & Mesh Conversion 6 August 26, 2015 10:38
[DesignModeler] DM's JScript: FPoint()'s GetPoint(i) function picks points backwards? ANT ANSYS Meshing & Geometry 2 July 23, 2012 16:25


All times are GMT -4. The time now is 19:07.