CFD Online Logo CFD Online URL
Home > Forums > Software User Forums > OpenFOAM > OpenFOAM Running, Solving & CFD

2D wedge simulation

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

LinkBack Thread Tools Search this Thread Display Modes
Old   January 17, 2019, 13:50
Default 2D wedge simulation
Senior Member
Artur's Avatar
Join Date: May 2013
Location: Southampton, UK
Posts: 372
Rep Power: 19
Artur will become famous soon enough
Hi All,

I'm trying to run a 2D axisymmetric simulation with simpleFoam but not matter what I do it always seems to try to solve for the 3rd component of velocity when I used the "wedge" BC. I have dug into the tutorials and see the same thing happen in interFoam/nozzleFlow2D, for instance. The mesh check also clearly shows that the grid is indeed 2D but for some reason has 3 solution directions:

Checking geometry...
    Overall domain bounding box (-0.65 0 -0.028352602) (1.95 0.65 0.028352602)
    Mesh has 2 geometric (non-empty/wedge) directions (1 1 0)
    Mesh has 3 solution (non-empty) directions (1 1 1)
    Wedge side_pos with angle 2.4976236 degrees
    Wedge side_neg with angle 2.4976236 degrees
    All edges aligned with or perpendicular to non-empty directions.
    Boundary openness (8.0639549e-19 -3.9251831e-15 2.7113778e-14) OK.
    Max cell openness = 2.4730408e-15 OK.
    Max aspect ratio = 125.01216 OK.
    Minimum face area = 2.5901831e-11. Maximum face area = 0.0029599635.  Face area magnitudes OK.
    Min volume = 1.6935059e-14. Max volume = 0.00013206161.  Total volume = 0.0478444.  Cell volumes OK.
    Mesh non-orthogonality Max: 75.256619 average: 4.8024892
   *Number of severely non-orthogonal (> 70 degrees) faces: 1.
    Non-orthogonality check OK.
  <<Writing 1 non-orthogonal faces to set nonOrthoFaces
    Face pyramids OK.
    Max skewness = 0.8198976 OK.
    Coupled point location match (average 0) OK.

Mesh OK.
For this reason I can never achieve good convergence, even though all the other fields converge very well (see attached figure). I will need to run a variant of this set up dozens of times and so stopping the simulation at convergence and not after a fixed amount of iterations is very important to me. Does anyone have any suggestions on how to do it?



Artur is offline   Reply With Quote


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
Some questions about flow boiling simulation in Fluent beastieboys6 FLUENT 8 November 20, 2017 23:47
Simulation FPEs - turbulence for transient and steady-state? DaveR OpenFOAM Running, Solving & CFD 5 March 5, 2017 15:06
Problem with pipe flow simulation with wedge shaped domain and recirculation bubbles sahmed OpenFOAM Running, Solving & CFD 0 August 17, 2016 14:56
symmetry for simulation of a wedge ghoroobeaakhar CFX 6 April 18, 2014 08:03
Simulation of a free falling wedge into water 2D nico765 OpenFOAM Running, Solving & CFD 3 January 11, 2009 02:47

All times are GMT -4. The time now is 19:38.