### 9.1.2. Common Import Options

#### 9.1.2.1. Mesh Units

This option is displayed depending on the file type selected. The units selected on the Import Mesh dialog box are the units used to import the mesh and are the default units for transforming mesh assemblies using the Mesh Transformation Editor dialog box. These units are local to the mesh import and transformation options and do not affect either the solution units or the units set under Edit > Options. For details, see:

- Setting the Solution Units

- Units.

CFX-Pre will attempt to determine the units used in a mesh file and convert them to the specified units during import. For example, a mesh of 1000 units long, with units in the mesh file of mm, will appear in CFX-Pre as 1 m long, if units of m are set on the Import Mesh dialog box. If CFX-Pre cannot determine the units used in the mesh file, then in this example the mesh would appear as 1000 m long.

#### 9.1.2.2. Assembly Prefix

This is the name used to prefix the assemblies that are created when the mesh is imported. A number suffix is added to the second, and any subsequent meshes, using the same assembly prefix, so that each assembly is named uniquely.

#### 9.1.2.3. Primitive Strategy

This setting enables you to control the names of split regions.

The following options are available:

`Standard` - Select this option so that the name of each split region starts with “Primitive 2D” or “Primitive 3D”. For example, this option splits “My Region Name” into “Primitive 2D A” and “Primitive 2D B”.

`Derived` - Select this option so that the name of each split region is derived from the name of the region that is being split. For example, this option splits “My Region Name” into “My Region Name A” and “My Region Name B”.

#### 9.1.2.4. Ignore Invalid Degenerate Elements

If your mesh import fails because of invalid degenerate elements, then you can enable this toggle. However, your mesh may not be valid for use in the CFX-Solver. You may have to fix or remove the degenerate elements in the software used to generate the mesh.

#### 9.1.2.5. Duplicate Node Checking

Duplicate Node Checking is off by default and, in general, need not be selected.

Nodes within the specified relative tolerance are equivalenced into a single node (duplicate node removal). The default tolerance of 1e-04 is sensible and you should not change it. The relative tolerance is based on the local mesh length scale, so by default nodes within 0.001% of the average mesh edge length of all edges connected to a node will be equivalenced.

Release 18.2 - © ANSYS, Inc. All rights reserved.