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29.10.1 Setting Reference Values

To set the reference quantities used for computing normalized flow-field variables, use the Reference Values panel (Figure  29.10.1).

Report $\rightarrow$ Reference Values...

Figure 29.10.1: The Reference Values Panel
figure

You can input the reference values manually or compute them based on values of physical quantities at a selected boundary zone. The reference values to be set are Area, Density, Enthalpy, Length, Pressure, Temperature, Velocity, dynamic Viscosity, and Ratio Of Specific Heats.

For 2D problems, an additional quantity, Depth, can also be defined. This quantity will be used for reporting fluxes and forces, as well as relevant variables computed using the Surface Integrals panel and the Volume Integrals panel (e.g. Area, Flow Rate, Mass Flow Rate, Volume, etc.). You should verify that the value and units of Depth corresponds to the depth dimension of your application prior to reporting any of the variables above.

figure   

The units for Depth are set independently from the units for Length in the Set Units panel.

If you want to compute reference values from the conditions set on a particular boundary zone, select the zone in the Compute From drop-down list. Note, however, that depending on the boundary condition used, only some of the reference values may be set. For example, the reference length and area will not be set by computing the reference values from a boundary condition; you will need to set these manually.

To set the values manually, simply enter the value for each under the Reference Values heading.


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