Gambit automatically selects the source faces because

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GAMBIT automatically selects the source faces because you changed the vertex type on the wall face to Side . ii. Retain the default Interval size of 1 and click the Apply button at the bottom of the form. The pipe will be meshed as shown in Figure 3-15.
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MODELING A THREE-PIPE INTERSECTION (3-D) Procedure © Fluent Inc., Sep-04 3-33 Figure 3-15: Pipe meshed by changing the vertex type on the wall face to Side and using the Cooper meshing scheme ! It may be useful to remove the mesh from the display at this point; it is then easier to see the faces of the geometry for the other two pipes. The mesh is not deleted, just removed from the graphics window. To remove the mesh from the display, click the SPECIFY DISPLAY ATTRIBUTES command button at the bottom of the Global Control toolpad. Select the Off radio button to the right of Mesh near the bottom of the form and click Apply . 2. Mesh the second pipe using the Submap scheme on the wall face of the pipe and using the Cooper meshing scheme to mesh the volume. By enforcing the Submap scheme on the wall face of the pipe, GAMBIT will automatically modify the vertex types on this face to honor the Submap scheme. The criteria for the Cooper meshing scheme will then be fulfilled for the pipe, and the pipe can be meshed using the Cooper scheme. a) Set the meshing scheme for the wall face to Submap . MESH FACE MESH FACES This command sequence opens the Mesh Faces form.
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Procedure MODELING A THREE-PIPE INTERSECTION (3-D) 3-34 © Fluent Inc., Sep-04 i. Select the wall face of the second pipe (shown in Figure 3-16) in the graphics window. Wall face of second pipe Figure 3-16: Wall face of the second pipe volume
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MODELING A THREE-PIPE INTERSECTION (3-D) Procedure © Fluent Inc., Sep-04 3-35 ii. Select Quad in the Elements option menu under Scheme , and select Submap under Type . See the GAMBIT Modeling Guide for more information on the Submap scheme. iii. Retain the default Interval size of 1 . iv. Unselect the Mesh check box under Options . You unselected the Mesh check box because at this point you do not want to mesh the face; you only want to apply the meshing Scheme to the face. GAMBIT will mesh the face using the specified Scheme when it meshes the pipe volume. v. Click the Apply button at the bottom of the form. b) Mesh the pipe volume using the Cooper meshing scheme. MESH VOLUME MESH VOLUMES This command sequence opens the Mesh Volumes form.
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Procedure MODELING A THREE-PIPE INTERSECTION (3-D) 3-36 © Fluent Inc., Sep-04 i. Select the pipe volume in the graphics window. Note that Hex/Wedge Elements and the Cooper Type are automatically selected under Scheme in the Mesh Volumes form because you enforced the Submap scheme on the side face of the pipe. GAMBIT automatically selects the source faces because you enforced the Submap scheme on the side face of the pipe. ii. Retain the default Interval size of 1 under Spacing and click the Apply button at the bottom of the form.
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