Mesh
Use a Free Triangular mesh for the supportive mat, the metal shell, and the insulating air, and use a mapped mesh for the monoliths. Finally, add a boundary layer mesh to the monoliths, the mat, and the free flow domain.
1
In the Model Builder window, under Monolith Reactor Model click Mesh 1.
2
In the Settings window for Mesh, locate the Sequence Type section.
3
From the list, choose User-controlled mesh.
Size
1
In the Model Builder window, under Monolith Reactor Model > Mesh 1 click Size.
2
In the Settings window for Size, locate the Element Size section.
3
From the Predefined list, choose Coarser.
Size 1
1
In the Mesh toolbar, click  Sizing and choose Size.
2
Drag and drop below Size.
3
In the Settings window for Size, locate the Geometric Entity Selection section.
4
From the Geometric entity level list, choose Domain.
5
Select Domain 4 only.
6
Locate the Element Size section. From the Calibrate for list, choose Fluid dynamics.
7
From the Predefined list, choose Finer.
Mapped 1
1
In the Mesh toolbar, click  Mapped.
2
In the Settings window for Mapped, locate the Domain Selection section.
3
From the Geometric entity level list, choose Domain.
4
From the Selection list, choose ASC Catalyst.
5
Click  Clear Selection.
6
Select Domains 3 and 5 only.
Distribution 1
1
In the Mesh toolbar, click  Distribution.
2
Select Boundaries 6, 8, 10, and 12 only.
3
In the Settings window for Distribution, locate the Distribution section.
4
From the Distribution type list, choose Predefined.
5
In the Number of elements text field, type 20.
6
In the Element ratio text field, type 3.
Distribution 2
1
In the Mesh toolbar, click  Distribution.
2
Select Boundaries 9 and 47 only.
3
In the Settings window for Distribution, locate the Distribution section.
4
From the Distribution type list, choose Predefined.
5
In the Number of elements text field, type 80.
6
In the Element ratio text field, type 10.
7
Select the Symmetric distribution checkbox.
Distribution 3
1
In the Mesh toolbar, click  Distribution.
2
Select Boundaries 5 and 44 only.
3
In the Settings window for Distribution, locate the Distribution section.
4
From the Distribution type list, choose Predefined.
5
In the Number of elements text field, type 20.
6
In the Element ratio text field, type 3.
7
Select the Symmetric distribution checkbox.
Distribution 4
In the Mesh toolbar, click  Distribution.
Size 1
1
In the Model Builder window, right-click Free Triangular 1 and choose Size.
2
In the Settings window for Size, locate the Geometric Entity Selection section.
3
From the Geometric entity level list, choose Domain.
4
Select Domain 7 only.
Boundary Layers 1
1
In the Mesh toolbar, click  Boundary Layers.
2
Drag and drop below Boundary Layers 1.
3
In the Settings window for Boundary Layers, locate the Domain Selection section.
4
From the Geometric entity level list, choose Domain.
5
Select Domains 3–5 and 14 only.
Boundary Layer Properties
1
In the Model Builder window, click Boundary Layer Properties.
2
Select Boundaries 8, 10, 44, 46, and 47 only.
3
In the Settings window for Boundary Layer Properties, locate the Layers section.
4
In the Number of layers text field, type 6.
5
In the Stretching factor text field, type 1.3.
Boundary Layers 1
1
In the Model Builder window, click Boundary Layers 1.
2
Drag and drop below Free Triangular 1.
3
In the Settings window for Boundary Layers, click  Build All, then click the Zoom Extents button in the Graphics toolbar to view the entire geometry.