## 4.1. User Defined Remeshing

User Defined remeshing offers the greatest flexibility to customize the remeshing process. This comes at the expense of requiring that the data extraction, and geometry and mesh re-creation steps are executed by a user-specified external command, as illustrated in the figure below where the dashed line identifies steps that must be executed by the user-specified External Command.

Figure 4.2: Schematic for User Defined remeshing

This remeshing option is ideally suited for users who have previously completed an ‘in-house’ remeshing solution involving scripts or varying degrees of manual user-intervention. When this option is used, the following steps are automatically executed:

- Run the specified external command to generate a new mesh(es)

- Insert the new mesh(es) into the analysis definition, and generate an updated CFX-Solver Input file

- Interpolate the previously generated analysis results onto the new mesh, re-partition the mesh if a parallel run mode is selected, and continue the solution process.

The following examples outline the use of the User Defined remeshing option:

- Remeshing with Key-Frame Meshes

- Remeshing with Automatic Geometry Extraction.

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