Step 5: Materials

Materials

1.   Modify the properties for air, which will be used for the primary phase.

Materials air Create/Edit...

  The properties used for air are modified to match data used by Kuipers et al. [1]

(a)   Enter 1.2 kg/m $^3$ for Density.

(b)   Enter 994 J/kg-K for Cp.

(c)   Select user-defined from the Thermal Conductivity drop-down list to open the User Defined Functions dialog box.

i.   Select conduct_gas::libudf from the available list.

ii.   Click OK to close the User Defined Functions dialog box.

(d)   Click Change/Create.

2.   Define a new fluid material for the granular phase (the glass beads).

Materials air Create/Edit...

(a)   Enter solids for Name.

(b)   Enter 2660 kg/m $^3$ for Density.

(c)   Enter 737 J/kg-K for Cp.

(d)   Retain the selection of user-defined from the Thermal Conductivity drop-down list.

(e)   Click the Edit... button to open the User Defined Functions dialog box.

i.   Select conduct_solid::libudf in the User Defined Functions dialog box and click OK.

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

ii.   Click No in the Question dialog box.

(f)   Select solids from the FLUENT Fluid Materials drop-down list.

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