### 9.4.9. Advanced Options

The Advanced Options control your mesh-gluing strategy as described below.

#### 9.4.9.1. Glue Adjacent Meshes

If you enable this toggle, CFX-Pre will attempt to automatically glue each copy of the assembly together. This means that CFX-Pre will try to create a continuous mesh contained in a single assembly from the multiple copies. For the glue to be successful, physically matching boundaries with one-to-one node pairings must be found between the copy (or copies) and the original. The multiple copies will then be treated as a single continuous mesh in a single assembly with multiple 3D regions. A single domain can be created for the entire assembly without the need to create domain or periodic interfaces between each copy. If multiple domains are created, automatic domain interfaces can be created. For details, see Automatic Creation and Treatment of Domain Interfaces in the CFX-Solver Modeling Guide.

If boundaries do not physically match or one-to-one node pairings do not exist, then each copy will form a new assembly, which will require the creation of domain interfaces to connect them together.

When Delete Original is used in conjunction with Glue Matching Meshes, the original is deleted only if the gluing operation is successful.

For more information on gluing, see Gluing Meshes Together.

You can set the following advanced options:

Glue Strategy

  Choose the strategy that CFX-Pre will use in deciding how mesh selections being transformed are glued with each other and with other areas of mesh:

  - Location and Transformed causes CFX-Pre to try to create connections automatically between the selected location being transformed and any copies that are made.

  - Location and Transformed and Touching requests that CFX-Pre tries to glue the transformed locations with any copies made and also with any other mesh locations that are in contact with the transformed location or transformed copies.

Keep Assembly Names

  An assembly is a group of mesh regions that are topologically connected. Each assembly can contain only one mesh, but multiple assemblies are permitted.

  When transforming a location, existing assemblies can be modified or created by removing connections between 3D regions or can be merged by creating connections between 3D regions. The setting of Keep Assembly Names can be altered to indicate whether CFX-Pre should attempt to preserve assembly names that were present in the problem before the transformation took place, therefore ensuring that the locations used by physics objects are not invalidated:

  - None: no attempt is made by CFX-Pre to retain existing assembly names

  - Existing: assembly names specified before the transformation takes place are preserved

  - Existing and Intermediate: the names of assemblies prior to the transformation and also any intermediate assembly names created during the transformation process will be preserved.

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