Generate hexahedral mesh

pluto · October 10, 2009, 04:23

Hi,

Can somebody please help me with the following. I have an axisymmetric flow that I need to model exiting a nozzle. I have created a 3D mesh. I extruded the nozzle exit boundary downstream to represent the external flow domain. How can I generate a hexahedral mesh from the 3D mesh? Please see attached images.

Thanks

3d mesh i created.jpg

mesh I require.jpg

fnk382 · October 13, 2009, 05:23

Hi Pluto,
It seems they do not have standard hexehedral meshing model to tool. They have the trimmer but it produces, for me, a disarrayed set to meshes.

I had to create a nice one in Gambit in order to import it to CCM+. Try that or use Star-CD.

Note that ANSYS, except ICEM hexa (you get this base on license type) does not also come with hexa mesh tools. Once, gambit becomes/is considered obsolete, one will have no choice but stick to the cost effective unstructured grids anyways.

Good meshing Pluto. Oh, and if you figure a way to do this, let me know.

pluto · October 13, 2009, 17:38

Hi fnk382

thanks for the advice. unfortunately i dont have access to STAR-CD but only to STAR-Design. I have checked on STAR-Design and there is no feature to generate a hexahedral mesh. Its a bit unfortunate that STAR-CCM+ does not have a hexahedral volume meshing tool. for now i will have to continue with the cylindrical extruded mesh. if i figure anything out i'll get back to you

thanks for the help fnk382

mystic_cfd · October 17, 2009, 16:37

just a comment to fnk382:
The Ansys meshing platform does have hex meshing capability.

perhaps you should look at the CAE Linux 2009 distro. There are a few freeware meshing tools included which might work for you.

Andi_Didi · November 7, 2017, 03:43

If you want to have hexahedral mesh in your domain, you can make it manually by direct mesh. Maybe you can learn direct meshing from this tutorial.
I hope it help.

https://drive.google.com/open?id=1ey...NVxwS3pPK6EFcU

October 10, 2009, 04:23	Generate hexahedral mesh	#1
pluto New Member Join Date: Jul 2009 Posts: 6 Rep Power: 17	Hi, Can somebody please help me with the following. I have an axisymmetric flow that I need to model exiting a nozzle. I have created a 3D mesh. I extruded the nozzle exit boundary downstream to represent the external flow domain. How can I generate a hexahedral mesh from the 3D mesh? Please see attached images. Thanks 3d mesh i created.jpg mesh I require.jpg

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October 13, 2009, 05:23		#2
fnk382 New Member fnk Join Date: Aug 2009 Posts: 4 Rep Power: 17	Hi Pluto, It seems they do not have standard hexehedral meshing model to tool. They have the trimmer but it produces, for me, a disarrayed set to meshes. I had to create a nice one in Gambit in order to import it to CCM+. Try that or use Star-CD. Note that ANSYS, except ICEM hexa (you get this base on license type) does not also come with hexa mesh tools. Once, gambit becomes/is considered obsolete, one will have no choice but stick to the cost effective unstructured grids anyways. Good meshing Pluto. Oh, and if you figure a way to do this, let me know.

October 13, 2009, 17:38		#3
pluto New Member Join Date: Jul 2009 Posts: 6 Rep Power: 17	Hi fnk382 thanks for the advice. unfortunately i dont have access to STAR-CD but only to STAR-Design. I have checked on STAR-Design and there is no feature to generate a hexahedral mesh. Its a bit unfortunate that STAR-CCM+ does not have a hexahedral volume meshing tool. for now i will have to continue with the cylindrical extruded mesh. if i figure anything out i'll get back to you thanks for the help fnk382

October 17, 2009, 16:37		#4
mystic_cfd New Member HP Kritzinger Join Date: May 2009 Location: South Africa Posts: 25 Rep Power: 17	just a comment to fnk382: The Ansys meshing platform does have hex meshing capability. perhaps you should look at the CAE Linux 2009 distro. There are a few freeware meshing tools included which might work for you.

November 7, 2017, 03:43		#5
Andi_Didi New Member Andi Join Date: Jun 2015 Location: Indonesia Posts: 17 Rep Power: 11	If you want to have hexahedral mesh in your domain, you can make it manually by direct mesh. Maybe you can learn direct meshing from this tutorial. I hope it help. https://drive.google.com/open?id=1ey...NVxwS3pPK6EFcU