You must select flow variables for a number of tasks in Ansys Fluent. The values are computed and placed in temporary memory that is allocated for storing the results for each cell. For example, the Compute command associated with a dialog box that contains the field variable drop-down list calculates the values of the selected function and places them into temporary storage.
Node, Cell, and Facet Values and Velocity Reporting Options provide some general information related to the field variables. In Field Variables Listed by Category, the variables are listed by category in Table 42.2: Pressure and Density Categories – Table 42.21: Acoustics Category . These tables will also indicate when each variable will be available. Alphabetical Listing of Field Variables and Their Definitions contains an alphabetical listing of the variables along with their definitions. All variables appear as they would in the variable selection drop-down lists that are contained in many of the Ansys Fluent dialog boxes. Custom Field Functions explains how you can calculate your own field function.