Creo Flow Analysis > Preprocessing > Defining Physics > Common > Common—Introduction
  
Common—Introduction
The Common module contains parameters and models common to all modules. This is created by default in the Flow Analysis Tree under Physics when you create a new project.
See below for a description of items in the Common module:
Definitions—Terms used in all the modules of flow, turbulence, heat, multiphase, and cavitation modeling.
Conditions—Specifying conditions for entities such as number of iterations, time definition, result saving frequency, mesh update frequency, cycle computation interval, and the outputs from the module.