CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM

Whate are cyclic BC restrictions

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

LinkBack Thread Tools Display Modes
Old   April 15, 2013, 03:56
Default Whate are cyclic BC restrictions
New Member
Esmaeil Ahmadiyan
Join Date: Sep 2011
Posts: 26
Rep Power: 8
e.ahmadiyan is on a distinguished road
Hi every body
In fact I want to simulate a simple L shape channel with dsmcFoam as shows in the bellow shape:

boundary condition type in inlet and outlet boundaries are cyclic and in other boundaries are wall.the boundary file as below:

type empty;
nFaces 600;
startFace 8300;
type wall;
nFaces 600;
startFace 8900;
type cyclic;
nFaces 100;
startFace 9500;
matchTolerance 0.0001;
neighbourPatch outlet1;
type cyclic;
nFaces 100;
startFace 9600;
matchTolerance 0.0001;
neighbourPatch inlet1;

But when I run the case runs failed and give this errors:

--> FOAM Serious Error :
From function cyclicPolyPatch:rder(const primitivePatch&, labelList&, labelList&) const
in file meshes/polyMesh/polyPatches/constraint/cyclic/cyclicPolyPatch.C at line 1385
Patchutlet1 : Cannot match vectors to faces on both sides of patch
Perhaps your faces do not match? The obj files written contain the current match.

No base point for face 9691, 4(340 341 1502 1483), produces a decomposition that has a minimum volume greater than tolerance.

My test case is ...

Is this problem depend on cyclic restrictions that could not be able to match two faces that are not parallel ?
are there such restriction ?

Please help me to resolve this problem.


Last edited by e.ahmadiyan; April 15, 2013 at 09:51.
e.ahmadiyan is offline   Reply With Quote


Thread Tools
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 On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Cyclic Mesh Error vbchris OpenFOAM Meshing & Mesh Conversion 4 November 15, 2012 14:04
Cyclic bc. and overlapGgi Pekka OpenFOAM 12 February 15, 2012 08:10
Problem with cyclic patches sven OpenFOAM Running, Solving & CFD 0 December 5, 2011 15:27
Handling cyclic BC from gambit to openfoam for a cascade airfoil problem - OF 1.6 maverick OpenFOAM Other Meshers: ICEM, Star, Ansys, Pointwise, GridPro, Ansa, ... 2 June 18, 2011 04:36
Pressure instability with rhoSimpleFoam daniel_mills OpenFOAM Running, Solving & CFD 44 February 17, 2011 18:08

All times are GMT -4. The time now is 03:12.