Step 4: Materials

Materials

1.   Define the material properties.

Materials Fluid Create/Edit...

(a)   Retain the selection of air from the FLUENT Fluid Materials drop-down list.

(b)   Select incompressible-ideal-gas law from the Density drop-down list.

  The incompressible ideal gas law is used when pressure variations are small but temperature variations are large. The incompressible ideal gas option for density treats the fluid density as a function of temperature only. If the above condition is satisfied, the incompressible ideal gas law generally gives better convergence compared to the ideal gas law, without sacrificing accuracy.

(c)   Retain the default values for all other properties.

(d)   Click Change/Create and close the Create/Edit Materials dialog box.