1
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At any time during model creation, click a node that has the option to add a geometric entity to a selection, for example, under the Materials node or for the Fixed Constraint node for a Solid Mechanics interface as in Figure 6-17.
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2
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In the Settings window that opens, select an option from the Selection list, for example, Manual or All boundaries.
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3
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Click the Create Selection button () and enter a Selection name in the Create Selection window, for example, Fixed Constraint Boundaries. Click OK or press enter.
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4
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In the Model Builder the new Explicit node (now named Fixed Constraint boundaries) is added under Definitions. After creating these named selections, the Selection list displays the name in the list as in Figure 6-18.
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1
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2
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Open The Selection List Window. Right-click and select Float to detach the window from the COMSOL Desktop.
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The COMSOL Multiphysics software displays the geometric entities in the Selection List based on where in the model you are working. Other nodes can be clicked to display the list of geometric entities. For example, the Materials, Solid Mechanics (in this example), Mesh, and Geometry nodes. Experiment in the COMSOL Desktop by clicking on different nodes and observing the changes in the Selection List and Graphics windows.
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3
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In the Graphics window toolbar, click the Select Boundaries button (). The Selection List displays a list of all boundaries in the geometry. Click the Select Domains, Select Edges, or Select Points buttons in the Graphics window and observe how the list and the geometry changes based on the geometric entity level.
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4
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In the Selection List window, click to pick the boundaries you want to add to an Explicit selection:
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5
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Once the boundaries are chosen, click the Create Selection button () and enter a Selection name in the Create Selection window, for example, Tube boundaries. Click OK or press enter.
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6
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Go to the Model Builder. The new Explicit node (now named Tube boundaries) is added under Definitions.
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