Union Selections
Porous and Free Flow Domains
1
In the Geometry toolbar, click  Selections and choose Union Selection.
2
In the Settings window for Union Selection, type Porous and Free Flow Domains in the Label text field.
3
Locate the Input Entities section. Click  Add.
4
In the Add dialog, in the Selections to add list, choose SCR Catalyst, ASC Catalyst, and Free Flow Domain.
5
Click OK.
Heat Transfer Domains
1
In the Geometry toolbar, click  Selections and choose Union Selection.
2
In the Settings window for Union Selection, type Heat Transfer Domains in the Label text field.
3
Locate the Input Entities section. Click  Add.
4
In the Add dialog, in the Selections to add list, choose SCR Catalyst, ASC Catalyst, Mat Domain, Metal Shell Domain, Free Flow Domain, and Insulating Gas.
5
Click OK.
Now it is time to set up the physics interfaces that describe the mass transport, heat transfer, and fluid flow in the monolithic reactor. Optionally, in the Model Builder toolbar, click Collapse All  to get a better overview of the tree for the remainder of the model setup.