[ANSYS Meshing] Can ANSYS ICEM CFD produce quadratic hexa?

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

 February 20, 2012, 03:45 Can ANSYS ICEM CFD produce quadratic hexa? #1 New Member   nalanrongruo Join Date: Dec 2011 Location: China Posts: 1 Rep Power: 0 Hello,everyone. Now I am using the ANSYS ICEM CFD to mesh geometry to get the high quality hexahedron. I use these hexahedra in the computational electromagnetics. even though I learn it for months, I still have some questions to ask. 1.Now I can only produce and export linear hexahedron, and I want to know can these hexahydra conform the geometry perfectly? For example, I want to mesh a ball, does the linear hexahedra conform to the ball's curved face perfectly? And, does ANSYS ICEM CFD has the ability to produce quadratic hexahedra and export the 27 nodes of these hexahedra? 2.Following the first question,when we use this software to judge the hexa's quality, what's the difference between determinant 2󫎾 and determinant 3󫢫. If the ICEM can only produce linear hexahedra, these two methods can get the same answer. So what's the use does the determinant 3󫢫 have? The procedure using 8 nodes to judge the hexa may simple and faster? Thank you and I am waiting for your answer!

 May 22, 2012, 09:29 Add Midside Nodes #2 Senior Member     Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,662 Blog Entries: 1 Rep Power: 35 Sorry I am so far behind on answering some of these questions... ICEM Hexa now produces only linear Hexa... You are right about the 3X3X3 check, it seems kind of silly. However, you can convert your linear hexas to quadratic hexa using Edit Mesh => Convert Mesh Type => Add Midside nodes. These nodes can be auto-projected to the geometry. __________________ ----------------------------------------- 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

 May 30, 2012, 01:58 #3 Senior Member   Rikio Join Date: Mar 2009 Location: SH, China Posts: 182 Blog Entries: 1 Rep Power: 8 There is an option under the shell meshing parameter, quadratic elements. Is it only useful for shell meshes? Pls see another post of mine, How would the quadratic elements to be used?

 May 31, 2012, 10:25 #4 Senior Member     Simon Pereira Join Date: Mar 2009 Location: Ann Arbor, MI Posts: 2,662 Blog Entries: 1 Rep Power: 35 Quadratic mesh is for FEA solvers, CFD solvers typically 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

 May 24, 2015, 04:56 Adding Midside Nodes works #5 New Member   wangteng Join Date: May 2015 Posts: 2 Rep Power: 0 I obtain 9-node quad elements and 27-node elemnts through adding a midside node. Then the element information of 9-node element can be exported with all 9 nodes, while i can only get 20 nodes of 27-node element through '' export mesh" . so how can I export all 27 nodes of a cubic element in nastran format?