[ICEM] How would the quadratic elements to be used?

rikio · May 29, 2012, 08:36

There is an option, Quadratic Elements, under the Shell Meshing Parameters, which is default to be checked off. How would this option be used? And it seems there is no such an option for the volume meshing.

PSYMN · May 31, 2012, 09:55

Many FEA solvers use quadratic elements for a better fit to the geometry. It places an extra node on the middle of each side of each element and projects these to the surface... The edge is then formed as a quadratic curve between the three nodes...

All CFD solvers (that I know of) use linear elements.

tengwang · May 24, 2015, 06:07

I need to obtain a mesh information with hex27 for a further calculation, while I can only export the mesh information with only 20 nodes in each element in nastran format with ICEM CFD. The structure has been meshed by hex27 already. So is there a way to do this?

Thanks a lot for advices !

Quote:

Originally Posted by PSYMN

Many FEA solvers use quadratic elements for a better fit to the geometry. It places an extra node on the middle of each side of each element and projects these to the surface... The edge is then formed as a quadratic curve between the three nodes...

All CFD solvers (that I know of) use linear elements.

May 29, 2012, 08:36	How would the quadratic elements to be used?	#1
rikio Senior Member Rikio Join Date: Mar 2009 Location: SH, China Posts: 182 Blog Entries: 1 Rep Power: 17	There is an option, Quadratic Elements, under the Shell Meshing Parameters, which is default to be checked off. How would this option be used? And it seems there is no such an option for the volume meshing.

May 31, 2012, 09:55		#2
PSYMN Senior Member Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,663 Blog Entries: 1 Rep Power: 47	Many FEA solvers use quadratic elements for a better fit to the geometry. It places an extra node on the middle of each side of each element and projects these to the surface... The edge is then formed as a quadratic curve between the three nodes... All CFD solvers (that I know of) use linear elements. __________________ ----------------------------------------- Please help guide development at ANSYS by filling in these surveys Public ANSYS ICEM CFD Users Survey This second one is more general (Gambit, TGrid and ANSYS Meshing users welcome)... CFD Online Users Survey

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