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Create DFN Control Volume

The Create DFN Control Volume option allows you to construct a volume explicitly for addressing DFNs. The DFN control volume can be generated by either customizing a box or choosing from existing volumes. Steps are described in below sections. After DFN Control Volumes are created, DFN sets can be added to them with the Add a DFN option:

  • Select the volumes from the Visibility Tree or in the model with the Entity Selection b_entity selection tool from the toolbar, and proceed to the Add a DFN b_add a DFN option under the Discrete Fracture Networks (DFNs) sub-menu from the Materials menu. See the Add a DFN using Control Volume section on another page for detail steps.
  • For more information about Add a DFN, please see the linked topic.

Customize a box

  1. Make sure no entity is selected in the model.
  2. Select the Create DFN Control Volume b_create DFN control volume option under the Discrete Fracture Networks (DFNs) sub-menu from the Materials menu. You will be prompted to a dialog
  3. define DFN control volume_dlg

  4. In the Define DFN Control Volume dialog, you can define the volume either by a) entering parameters or b) using the Freehand Manipulation tool b_freehand manipulation in the viewport.
    1. Choose a method from the Defined By dropdown list.
      • If Defined By = 2 Corners, the XYZ coordinates for the two corner vertices of the box need to be specified.
      • If Defined By = Dimensions, the XYZ coordinates for the center point of the box, as well as the length, width, and height dimensions of the box need to be specified.

      The expandable Rotation Angles section can rotate the box. The rotation angles around the X, Y, and Z axes are required.

    2. A Freehand Manipulation tool b_freehand manipulation tool will appear in the viewport. It is placed at the center of the box by default. You can hover the mouse to place the tool at any corner. When the Freehand Manipulation is at the center, you can drag the tool to translate the box, or drag the curve to rotate the box. When the tool is at a corner, you can drag the arrow to resize the box dimension along the corresponded axis.
      • The dimension and rotation angle values will be updated to the Define DFN Control Volume dialog.

      In the Define DFN Control Volume dialog, the Reset button can reset the box. The Cancel button can exit the dialog.

  5. When completed, select OK to apply and exit the dialog. The DFN Control Volume will be added to the model and the entity will be added to the Visibility Tree.

Choose from existing volume(s)

  1. Select one or more desired volume entity(s) either from the Visibility Tree or with the Entity Selection b_entity selection tool from the toolbar.
  2. Select the Create DFN Control Volume b_create DFN control volume option under the Discrete Fracture Networks (DFNs) sub-menu from the Materials menu.
  3. For each selected volume, a DFN control volume entity will be created in the model, and also added to the Visibility Tree.
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