CFD Online Logo CFD Online URL
Home > Forums > OpenFOAM Bugs

[blockMesh] arbitrary behaviour at creation of arc edges

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

LinkBack Thread Tools Display Modes
Old   January 29, 2011, 07:15
Default [blockMesh] arbitrary behaviour at creation of arc edges
New Member
Join Date: Jan 2010
Location: Germany
Posts: 9
Rep Power: 9
kpm is on a distinguished road
As I received an "APPLICATION ERROR #2800" upon trying to set my password after following the link for the mantis registration, I report my issue here:

I believe there is a bug in blockMesh.
ArcEdges sometimes evolve around the wrong portion of the circle.
For example, if I define a 90 degree arc, the edge will try to exist
along the remaing 270 degrees of the circle, even if the middle
point isn't in this portion of the circle.
Swapping start and end points didn't help.

The issue seems to be affected by the arc edge's orientation to the coordinate system.
Refer to the attached picture. The radial tubes have arc edges in tangential planes
to create a circular cross-section.
The only tube that comes out correctly is the one where the tangential planes
of the arcs are within the y-z-plane.
If I create blocks around the radial tubes, the issue disappears,
and the arc edges turn out correctly.

blockMesh should either create arcs correctly, preferably such that the middle point
is actually in the middle of the arc, or provide additional dictionary options to
control arc creation.

blockMeshDict attached
Attached Images
File Type: jpg BlockmeshArc.jpg (20.6 KB, 61 views)
Attached Files
File Type: zip (95.3 KB, 17 views)
kpm is offline   Reply With Quote

Old   February 7, 2011, 09:29
New Member
Join Date: Jan 2010
Location: Germany
Posts: 9
Rep Power: 9
kpm is on a distinguished road
Sorry folks, that bug was not in blockMesh, but somewhere between keyboard and chair.
kpm 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
SnappyHexMesh for internal Flow vishwa OpenFOAM Native Meshers: snappyHexMesh and Others 24 June 27, 2016 08:54
weird error during blockMesh SePe OpenFOAM 1 October 25, 2010 10:31
Axisymmetric Grid N. A. OpenFOAM 5 July 2, 2010 10:39
Specifying boundary faces failes in blockMesh blaise OpenFOAM Meshing & Mesh Conversion 0 May 10, 2010 03:56
external flow with snappyHexMesh chelvistero OpenFOAM 11 January 15, 2010 20:43

All times are GMT -4. The time now is 22:07.