Step 4: Materials

Materials

1.   Set the properties for air.

Materials air Create/Edit...

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

  Since pressure variations are insignificant compared to temperature variation, we choose incompressible-ideal-gas law for density.

(b)   Retain the default settings for all other parameters.

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

2.   Create a new material, lens.

Materials Solid Create/Edit...

(a)   Enter lens for Name and delete the entry in the Chemical Formula field.

(b)   Enter 2200  $Kg/m^3$ for Density.

(c)   Enter 830 J/Kg-K for Cp (Specific Heat).

(d)   Enter 1.5 W/m-K for Thermal Conductivity.

(e)   Enter 200 1/m for Absorption Coefficient.

(f)   Enter 1.5 for Refractive Index.

(g)   Click Change/Create.

  A Question dialog box will open, asking if you want to overwrite aluminum.

(h)   Click No in the Question dialog box to retain aluminum and add the new material ( lens) to the materials list.

  The Create/Edit Materials dialog box will be updated to show the new material, lens, in the FLUENT Solid Materials drop-down list.

(i)   Close the Create/Edit Materials dialog box.