[ANSYS Meshing] Internal walls at slices in geometry

McFly · April 11, 2013, 06:08

Hello folks,

I'm new to CFD and thought I was progressing well, however I'm stuck with a mesh that won't behave itself.

As a starter I'm going through the standard 'flow over a cylinder' case. I have the geometry and mesh looking good - however when I load the mesh into fluent internal walls appear at the lines where I've cut the geometry.

This appears to be a common problem for beginners but the common solution of making all the bodies one part doesn't solve it for me. I had a similar problem two days ago and that worked fine but for some reason today it isn't working.

Any thoughts? I've been at this for about four hours and aren't getting anywhere. I've searched the forum, google and the rest.

Cheers

McFly · April 11, 2013, 08:25

I fixed the problem, but I've no idea why it happened in the first place.

I went back to the geometry and named every section a unique name - they were all 'surface part' or something similar. For some reason the mesh now gives the borders the internal property instead of walls, and calls them one of the names I supplied.

I'm a bit confused as to why that made a difference but at least I can get on with my project.

April 11, 2013, 06:08	Internal walls at slices in geometry	#1
McFly New Member Martin Goddard Join Date: Mar 2013 Location: Melbourne, AU Posts: 22 Rep Power: 13	Hello folks, I'm new to CFD and thought I was progressing well, however I'm stuck with a mesh that won't behave itself. As a starter I'm going through the standard 'flow over a cylinder' case. I have the geometry and mesh looking good - however when I load the mesh into fluent internal walls appear at the lines where I've cut the geometry. This appears to be a common problem for beginners but the common solution of making all the bodies one part doesn't solve it for me. I had a similar problem two days ago and that worked fine but for some reason today it isn't working. Any thoughts? I've been at this for about four hours and aren't getting anywhere. I've searched the forum, google and the rest. Cheers

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[ICEM] Shadow walls in Fluent. ICEM meshes vs Workbench	aarvay	ANSYS Meshing & Geometry	11	January 12, 2017 13:51
[DesignModeler] Error while Loading a Geometry	JD944	ANSYS Meshing & Geometry	0	October 25, 2011 15:51
Meshing geometry with internal pillars	gummy	Main CFD Forum	1	March 21, 2010 13:44
Meshing of internal geometry	PAD	FLUENT	1	July 12, 2006 07:27
Internal Walls in Hex	hagupta	CFX	4	June 7, 2006 10:09

April 11, 2013, 08:25		#2
McFly New Member Martin Goddard Join Date: Mar 2013 Location: Melbourne, AU Posts: 22 Rep Power: 13	I fixed the problem, but I've no idea why it happened in the first place. I went back to the geometry and named every section a unique name - they were all 'surface part' or something similar. For some reason the mesh now gives the borders the internal property instead of walls, and calls them one of the names I supplied. I'm a bit confused as to why that made a difference but at least I can get on with my project.