Workflow

The process cycle is as followed:

- During preprocessing
- The geometry (physical bounds) of the problem is defined
- The volume occupied by the fluid is divided into discrete cells (the mesh). The mesh may be uniform or non uniform.
- The physical modelling is defined - for example, the equations of motions + enthalpy + radiation + species conservation
- Boundary conditions are defined. This involves specifiying the fluid behavior and properties at the boundaries of the problem. For transient problems, the initial conditions are also defined.

- The simulation is started and the equations are solved iteratively as steady-state or transient.
- Finaly a postprocessor is used for the analysis and visualization of the resulting solution.

The preconditions for a simulation

- physical description: Ther must be a model described by physics.
- reasonable computing time: the computing time depends on complexity of the mesh and the numerical solution mehtod.