COMSOL 6.2 - The Selection List Window

) (see Figure 6-12) to make it easier to choose objects, for example, while working with complex geometries and when you need to easily locate a geometric entity that is not easily viewed. The Selection List is particularly useful when you know the geometric entity number to select; for example, when you are following step-by-step instructions to build an example from the application libraries (in that case, you can also copy and paste the selections directly from the instructions). It also includes a list of named selections, when available.

	To open the window, from the Home toolbar select Windows>Selection List (). By default, it appears to the right on the COMSOL Desktop.

	To open the window, select Windows>Selection List (). By default, it appears to the right on the COMSOL Desktop.

	The Selection List window is empty when Sketch visualization is used in a 2D geometry.

The window displays all geometric entities of a certain type (boundaries, for example) and also named selections for the same entity type. COMSOL Multiphysics determines the geometric entities listed based on where in the model you are working. This is different from selection lists in windows, which contain lists of the selected entities only (see About Selecting Geometric Entities, Figure 6-7). At the top of the window, the window displays the number of selected entities.

At the top of the window, there is a toolbar with buttons that are explained below. The toolbar buttons only apply to nodes selected in the upper list of geometric entities.

Click the button (

) and enter a in the window to create a new selection. If applicable, such as when you create an explicit boundary selection when a boundary condition node is selected, for example, a Use in check box (, for example) is available ans selected by default. The selection in that node then becomes the new explicit selection. Clear the check box to keep the current selection.

See Copying and Pasting Selection Lists for information about the and buttons.

Use the button (

) to add a selected entity from the window to a selection for boundary condition, for example. Use the button (

) to remove selected items from a selection. Use the (

) and (

) buttons to hide and show selected geometric entities, respectively. You can also right-click an item in the selection list and choose any of those four menu options (, , , or ; see Working with the List of Named Selections below). Click the (

) and (

) button to collapse or expand the top list, when it is a tree of geometry objects (this functionality is not available in the sketch mode).

The selected items in the window are indicated by next to the entity label, except if you choose to only list the selected items by selecting from the menu (

) on the toolbar. You can also view and select any named selection in the model under , , , , or . When you right-click a named selection or group of such selections, you can choose (a submenu), (

), (

), or (

) as desired (see Working with the List of Named Selections below).

Click any item to see it highlighted in The Graphics Window — except if the item is hidden, which is indicated in the Selection List by , unless you choose to only list the visible items by selecting from the menu (

) on the toolbar — and select items as described in Selecting and Clearing Selection of Geometric Entities.

From the menu (

) on the toolbar, you can filter the list of selected entities by choosing , , and as desired. Choose to if the model includes many entities that are selected but not applicable, for example.

Under , for example, select a number of nodes in the list of named selections to highlight the corresponding entities in the graphics. Right-click and select one of the following items from the context menu:

•

From the submenu, choose one of the following: (if at least two named selections are selected), , , , , , or (in 3D). In 2D, is available together with but not or . In 1D, and are available but not . Choosing one of these options creates a new named selection of the chosen type based on the selected named selections.

•

(

), for example. This adds the corresponding geometric entities or objects to the selection in the currently selected node. If no such node is selected, instead Ctrl-click some boundaries, for example, right-click, and choose to makes the corresponding boundaries selected in the window.

•

(

). This removes the corresponding geometric entities or objects from the selection in the currently selected node. If no such node is selected, instead Ctrl-click some selected boundaries, for example, right-click, and choose to remove the selection for the corresponding boundaries selected in the window.

For example, you can use the Selection List in the following situations:

When working in windows with Selection or Geometric scope sections (a window under a node for example), or anywhere you assign materials, physics features, boundary conditions, and other Component settings. The displays the specific geometric entity level selected (domain, boundary, edge, or point).

When in the Model Builder under the node, the geometry objects are displayed in the , for example, ext1 (extrusion), blk1 (solid), or cone1 (solid) (Figure 6-13). You might also use it with a Chamfer or Fillet geometry feature when you want to locate specific points. To specify the selection level, click the button in the window toolbar and add the points to the or lists. See Creating Named Selections in the Geometry Sequence for details about creating selections based on geometry sequences.

When in the Model Builder under the node, the list also includes information on which entities are meshed by adding to the right of the meshed entities. If the Geometry has Mesh Control entities, the list also specifies if a mesh control entity has been removed; see Controlling the Mesh Size Using Mesh Control Entities. This is indicated next to the entity in the list by .