Q. When importing a single connected mesh in a 'Patran Neutral File' format into CFX Pre, it comes in as multiple assemblies. How do we glue them together into a single assembly/domain?
A. This is most likely a problem that happens during mesh import in CFX - Pre, due to the way the neutral file was written. Generic mesh formats (especially Patran Neutral Files) have a tendency to have duplicate nodes on internal solid/block interfaces. When such mesh files are imported into CFX Pre, the connectivity cannot be established at the interfaces and hence it gets imported as different mesh assemblies.
The recommended way to fix this is to turn on 'Duplicate Node Checking' in CFX Pre, during mesh import. In this case:
1) On 'Mesh Import' form select 'Mesh Format ' = 'PATRAN Neutral'
2) Select appropriate units.
3) Click on 'Advanced Options ' tab on the mesh import form.
4) Turn On (Tick Box) 'Duplicate Node Checking'
5) Keep the default 'Relative Tolerance' and -Apply- to import the mesh.
In most cases this should bring the mesh in as one assembly, unless there is an actual mismatch of the mesh between different regions. In there is actual mismatch in the mesh, you could opt to use the 'Domain Interfaces' (GGI) to connect the different assemblies together. Please refer to 'Help' for more details on the use of 'Domain Interfaces'.
When you turn on 'Duplicate Node Checking', nodes within the given tolerance are equivalenced into a single node, hence allowing PRE to establish connectivity between the different mesh regions. This operation usually can also be done in the package where the mesh was originally created.
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Q. When importing a single connected mesh in a 'Patran Neutral File' format into CFX Pre, it comes in as multiple assemblies. How do we glue them together into a single assembly/domain? A. This is most likely a problem that happens during mesh import in CFX - Pre, due to the way the neutral file was written. Generic mesh formats (especially Patran Neutral Files) have a tendency to have duplicate nodes on internal solid/block interfaces. When such mesh files are imported into CFX Pre, the connectivity cannot be established at the interfaces and hence it gets imported as different mesh assemblies. The recommended way to fix this is to turn on 'Duplicate Node Checking' in CFX Pre, during mesh import. In this case: 1) On 'Mesh Import' form select 'Mesh Format ' = 'PATRAN Neutral' 2) Select appropriate units. 3) Click on 'Advanced Options ' tab on the mesh import form. 4) Turn On (Tick Box) 'Duplicate Node Checking' 5) Keep the default 'Relative Tolerance' and -Apply- to import the mesh. In most cases this should bring the mesh in as one assembly, unless there is an actual mismatch of the mesh between different regions. In there is actual mismatch in the mesh, you could opt to use the 'Domain Interfaces' (GGI) to connect the different assemblies together. Please refer to 'Help' for more details on the use of 'Domain Interfaces'. When you turn on 'Duplicate Node Checking`, nodes within the given tolerance are equivalenced into a single node, hence allowing PRE to establish connectivity between the different mesh regions. This operation usually can also be done in the package where the mesh was originally created. |
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