[ANSYS Meshing] Two bodies, same settings, wrong result. Please help us

StudentinANSYS · February 6, 2017, 09:12

Hello!

Starting with two pictures in this link: http://imgur.com/a/TJnV9

The geometry is divided by two parts named as one part in DM. The geometry is representing a pipe with a contraction halfway into a smaller pipe. The geometry is a revolve of 10°, the bigger pipe diameter is 19,1 mm and the smaller pipe diameter is 10,2 mm. Length of each pipe is 0,3 m.

I need these two bodies to make the same pattern showed in the second picture (upper part). When only meshing part 1, the bigger geometry of the pipe, I get the same pattern all the way with no irregularities. But when adding the smaller pipe with the same settings, I get the result showed in the pictures. How do I force them to mesh with the same grid?

They are already dependent on the same sizing and methods so It's really confusing to us

/Jakob

StudentinANSYS · February 9, 2017, 09:12

Still haven't found a good way to make the more narrow pipe follow the mesh-pattern as the bigger pipe, any ideas? Anyone?

Zbynek · February 10, 2017, 04:46

You need to tell the mesher to sweep the surface mesh from one lateral side to the other lateral side using Source and Target Faces. Now it seems like that it sweeps the mesh from the front to the back. Anyway, I am afraid that you will get a poor quality mesh in the sharp end of your geometry where all the cell lines gather. You may consider a mesh that would be less regular than what you want but would have a better quality. Try it and you will see.

February 6, 2017, 09:12	Two bodies, same settings, wrong result. Please help us	#1
StudentinANSYS New Member Jakob Lindqvist Join Date: Dec 2016 Posts: 9 Rep Power: 9	Hello! Starting with two pictures in this link: http://imgur.com/a/TJnV9 The geometry is divided by two parts named as one part in DM. The geometry is representing a pipe with a contraction halfway into a smaller pipe. The geometry is a revolve of 10°, the bigger pipe diameter is 19,1 mm and the smaller pipe diameter is 10,2 mm. Length of each pipe is 0,3 m. I need these two bodies to make the same pattern showed in the second picture (upper part). When only meshing part 1, the bigger geometry of the pipe, I get the same pattern all the way with no irregularities. But when adding the smaller pipe with the same settings, I get the result showed in the pictures. How do I force them to mesh with the same grid? They are already dependent on the same sizing and methods so It's really confusing to us /Jakob

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February 9, 2017, 09:12		#2
StudentinANSYS New Member Jakob Lindqvist Join Date: Dec 2016 Posts: 9 Rep Power: 9	Still haven't found a good way to make the more narrow pipe follow the mesh-pattern as the bigger pipe, any ideas? Anyone?

February 10, 2017, 04:46		#3
Zbynek Member Join Date: Jun 2016 Posts: 66 Rep Power: 10	You need to tell the mesher to sweep the surface mesh from one lateral side to the other lateral side using Source and Target Faces. Now it seems like that it sweeps the mesh from the front to the back. Anyway, I am afraid that you will get a poor quality mesh in the sharp end of your geometry where all the cell lines gather. You may consider a mesh that would be less regular than what you want but would have a better quality. Try it and you will see.