Why i am getting this error?

Maralady · February 19, 2013, 01:03

I did the geometry using solidworks, then made the mesh at workbench and as soon as i load cfx the geometry looks like this (See the picture), No idea of whats wrong in here, as you can see the geometry looks nasty.

ghorrocks · February 19, 2013, 04:02

If you mean those lines on it - they are because those mesh edges trigger the corner critereon as the element angle is high. This is a common problem when you have a coarse mesh.

So the solution is to use a finer mesh. There is no way you would ever get an accurate simulation on a mesh that coarse.

Maralady · February 19, 2013, 20:35

Thank you sir i will try that.

Maralady · February 19, 2013, 20:54

Ok, that problem was fixed thanks to your advice ghorrock, but now i have a different error, why my geometry looks like this? It looks irregular and i really have no idea why

ghorrocks · February 19, 2013, 21:13

Again, it is your mesh. The mesh is representing your shape with flat triangles, so it will depart from the real geometry. The finer the mesh the smaller the deviation.

But again, if you can see the deviation easily then you mesh is too coarse. A realistic mesh will have this deviation small enough that you have to zoom right in to see it.

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February 19, 2013, 04:02		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	If you mean those lines on it - they are because those mesh edges trigger the corner critereon as the element angle is high. This is a common problem when you have a coarse mesh. So the solution is to use a finer mesh. There is no way you would ever get an accurate simulation on a mesh that coarse.

February 19, 2013, 20:35		#3
Maralady Member Arthur Loginow Join Date: Aug 2012 Posts: 99 Rep Power: 13	Thank you sir i will try that.

February 19, 2013, 21:13		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,700 Rep Power: 143	Again, it is your mesh. The mesh is representing your shape with flat triangles, so it will depart from the real geometry. The finer the mesh the smaller the deviation. But again, if you can see the deviation easily then you mesh is too coarse. A realistic mesh will have this deviation small enough that you have to zoom right in to see it.