Mesh
Meshing is a critical step in any plasma model. Boundary layer meshing on the reactor walls is nearly always necessary. This is needed to capture the separation of space charge between the electrons and ions close to the wall. You also add a fine mesh in the coil domains since the skin effect needs to be resolved.
1
In the Model Builder window, click Mesh 1 .
2
In the Mesh settings window, locate the Mesh Settings section.
3
From the Element size list, choose Finer.
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Right-click Mesh 1 and choose More Operations > Edge .
5
Select Boundaries 6, 8, 44, 45, and 54 only.
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Right-click Component 1 > Mesh 1 > Edge 1 and choose Size .
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In the Size settings window, locate the Element Size section.
8
Click the Custom button.
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Locate the Element Size Parameters section. Select the Maximum element size checkbox.
10
In the associated text field, type 1E-3.
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In the Model Builder window, right-click Mesh 1 and choose Free Triangular .
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In the Free Triangular settings window, locate the Domain Selection section.
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From the Geometric entity level list, choose Domain.
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Select Domain 3 only.
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Right-click Component 1 > Mesh 1 > Free Triangular 1 and choose Size .
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In the Size settings window, locate the Element Size section.
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From the Predefined list, choose Extra fine.
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In the Model Builder window, right-click Mesh 1 and choose Boundary Layers .
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In the Boundary Layers settings window, locate the Domain Selection section.
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From the Geometric entity level list, choose Domain.
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Select Domain 3 only.
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In the Model Builder window, under Component 1 > Mesh 1 > Boundary Layers 1 click Boundary Layer Properties .
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In the Boundary Layer Properties settings window, locate the Boundary Selection section.
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From the Selection list, choose Walls.
25
Locate the Boundary Layer Properties section. In the Number of boundary layers field, type 5.
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In the Boundary layer stretching factor field, type 1.4.
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In the Model Builder window, right-click Mesh 1 and choose Mapped .
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In the Mapped settings window, locate the Domain Selection section.
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From the Geometric entity level list, choose Domain.
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From the Selection list, choose Coils.
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Right-click Component 1 > Mesh 1 > Mapped 1 and choose Distribution .
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In the Distribution settings window, locate the Boundary Selection section.
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From the Selection list, choose Coil Boundaries.
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In the Distribution settings window, locate the Distribution section.
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From the Distribution type list, choose Predefined distribution type.
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In the Number of elements field, type 25.
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In the Element ratio field, type 20.
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From the Growth formula list, choose Geometric sequence.
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Select the Symmetric distribution checkbox.
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In the Model Builder window, right-click Mesh 1 and choose Free Triangular .
41
Right-click Mesh 1 and choose Build All .