[Technical] Mesh with internal zerothickness surfaces

michele · September 22, 2005, 07:56

I'm approaching to sails computations.
I need to produce meshes that include zero-thickness wall surfaces (the sails).
Has anyone experience in how can be produced the initial solid model and this kind of mesh?
Thanks
Michele.

mattijs · September 22, 2005, 13:41

You could generate a single mesh (don't know how), collect the faces into a faceSet (using the faceSet utility) and then use the splitMesh utility to locally introduce opposing patches.

Would be nice to hear if/how you managed to create the mesh.

billy · September 22, 2005, 14:42

Is that like a shell mesh?

michele · September 23, 2005, 04:22

Thanks Mattijs,
I will try to make some experiments.
For Billy: no, it is the opposite. I would like to compute the fluid flow around zero-thickness sails (with prescribed rigid geometry).

I would eventually couple the flow simulation with a sails structural behaviour (membrane for genoa and shells for more rigid sails).
In practice I need linear orthotropic constitutive laws under the hypothesis of large displacements.
The available FEM works only with 3d elements? Is the extension to these kind of elements straightforward?

Michele.

September 22, 2005, 07:56	Mesh with internal zerothickness surfaces	#1
michele Member Michele Join Date: Mar 2009 Posts: 42 Blog Entries: 1 Rep Power: 17	I'm approaching to sails computations. I need to produce meshes that include zero-thickness wall surfaces (the sails). Has anyone experience in how can be produced the initial solid model and this kind of mesh? Thanks Michele.

September 22, 2005, 13:41	You could generate a single me	#2
mattijs Senior Member Mattijs Janssens Join Date: Mar 2009 Posts: 1,419 Rep Power: 26	You could generate a single mesh (don't know how), collect the faces into a faceSet (using the faceSet utility) and then use the splitMesh utility to locally introduce opposing patches. Would be nice to hear if/how you managed to create the mesh.

September 22, 2005, 14:42	Is that like a shell mesh?	#3
billy Senior Member Billy Join Date: Mar 2009 Posts: 167 Rep Power: 17	Is that like a shell mesh?

September 23, 2005, 04:22	Thanks Mattijs, I will try	#4
michele Member Michele Join Date: Mar 2009 Posts: 42 Blog Entries: 1 Rep Power: 17	Thanks Mattijs, I will try to make some experiments. For Billy: no, it is the opposite. I would like to compute the fluid flow around zero-thickness sails (with prescribed rigid geometry). I would eventually couple the flow simulation with a sails structural behaviour (membrane for genoa and shells for more rigid sails). In practice I need linear orthotropic constitutive laws under the hypothesis of large displacements. The available FEM works only with 3d elements? Is the extension to these kind of elements straightforward? Michele.

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