### 1.4.1. Creating the Geometry/Mesh

This interactive process is the first preprocessing stage. The objective is to produce a mesh for input to the physics preprocessor. Before a mesh can be produced, a closed geometric solid is required. The geometry and mesh can be created in the Meshing application or any of the other geometry/mesh creation tools. The basic steps involve:

1. Defining the geometry of the region of interest.

2. Creating regions of fluid flow, solid regions and surface boundary names.

3. Setting properties for the mesh.

This preprocessing stage is now highly automated. In CFX, geometry can be imported from most major CAD packages using native format, and the mesh of control volumes is generated automatically.

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