[ICEM] ICEM Structured Mesh Problem

OMJT · March 22, 2013, 07:09

Hi Everyone,

I am having a problem with my structured mesh. It meshes a relatively simple structure and consists of O-grids around the structure and then H-grid for the rest. At a low mesh density its quality is very high yet when I increase the mesh density some very strange things happen:

1) Originally the mesh started to distort massively and would overlap other bits of mesh and actually cover the solid part of the structure where the mesh should not be.

2) After this was solved by carefully breaking the structure down into separate curves and attaching the mesh carefully to this the mesh was exported to Fluent. Here I received an error that there was a node with no face. When I looked closely at the location the mesh had distorted there too! This point was well away from the structure and not somewhere where the mesh was doing anything special. It was on the boundary between an O-grid mesh and H-grid.

If anyone can help me with this it would be much appreciated! Why is increasing the mesh density having this strange effect?

Thanks!

Matt

diamondx · March 22, 2013, 08:06

that should not happen. some picture or files can help....

BrolY · March 22, 2013, 08:09

Post pictures.

OMJT · March 22, 2013, 11:06

Thanks for the replies. I have photos which I will send when I am at that computer tomorrow.

March 22, 2013, 07:09	ICEM Structured Mesh Problem	#1
OMJT New Member Join Date: Jan 2013 Posts: 10 Rep Power: 13	Hi Everyone, I am having a problem with my structured mesh. It meshes a relatively simple structure and consists of O-grids around the structure and then H-grid for the rest. At a low mesh density its quality is very high yet when I increase the mesh density some very strange things happen: 1) Originally the mesh started to distort massively and would overlap other bits of mesh and actually cover the solid part of the structure where the mesh should not be. 2) After this was solved by carefully breaking the structure down into separate curves and attaching the mesh carefully to this the mesh was exported to Fluent. Here I received an error that there was a node with no face. When I looked closely at the location the mesh had distorted there too! This point was well away from the structure and not somewhere where the mesh was doing anything special. It was on the boundary between an O-grid mesh and H-grid. If anyone can help me with this it would be much appreciated! Why is increasing the mesh density having this strange effect? Thanks! Matt

March 22, 2013, 08:06		#2
diamondx Super Moderator Ghazlani M. Ali Join Date: May 2011 Location: Tokyo, Japan Posts: 1,385 Blog Entries: 23 Rep Power: 29	that should not happen. some picture or files can help.... __________________ Regards, New to ICEM CFD, try this document --> https://goo.gl/KAOIwm Ali

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March 22, 2013, 08:09		#3
BrolY Senior Member AB Join Date: Sep 2009 Location: France Posts: 323 Rep Power: 22	Post pictures.

March 22, 2013, 11:06		#4
OMJT New Member Join Date: Jan 2013 Posts: 10 Rep Power: 13	Thanks for the replies. I have photos which I will send when I am at that computer tomorrow.