Pre-Processor : Physics Preprocessor

After meshing is complete, ANSYS CFX offers a modern, consistent and intuitive interface for the definition of complex CFD problems. This pre-processor can read one or more meshes from a variety of sources. Once meshes have been loaded the user has great flexibility in assigning meshes to domains. Multiple meshes can be put into a single domain, or a single mesh can be split into multiple domains, depending on the demands of the problem physics.

Users are guided through physics definition by moving along the ‘Define’ toolbar, which presents the key steps in problem set-up. Existing cases may be loaded directly from ANSYS CFX DEF or RES files, ensuring consistent problem definition no matter how the problem may have been modified.

The creation and modification of physics objects is presented through a user interface with tabs providing easy access to model details. The evolving problem definition is displayed in the tree view, which shows the key objects that can be selected to access any part of the problem definition. Errors or inconstancies that occur during problem setup/modification are shown through color-coding in the object selector, or via descriptive messages in the Physics Message panel. Double clicking in either location will automatically open an editor to correct the problem.

Once problem definition is complete, hitting the ‘Go’ button will write a definition file for the ANSYS CFX solver.

As well as the general mode of operation, the ANSYS CFX physics pre-processor also offers some application-specific user modes. The Quick Setup wizard leads the user through the key problem definition steps while presenting a simplified but familiar user interface. A wizard can be enabled for the creation of multistage turbomachinery analyses from one or more meshes. This turbomachinery pre-processing mode automates the definition of component interfaces and boundary conditions on meshes that follow a standardized naming convention. The Model Library offers pre-defined physics definitions for complex or frequently repeated cases. The contents of the library are customizable, and can be extended by the user. For advanced users, this physics pre-processor is executable in batch mode and provides full access to CCL power syntax for advanced/custom applications and macros.