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6.8.6 Slitting Face Zones

The face-zone slitting feature has two uses:

When you slit a face zone, the solver will duplicate all faces and nodes, except those nodes that are located at the ends (2D) or edges (3D) of the zone. One set of nodes and faces will belong to one of the resulting boundary zones and the other set will belong to the other zone. The only ill effect of the shared nodes at each end is that you may see some inaccuracies at those points when you graphically display solution data with a slit boundary. (Note that if you adapt the boundary after slitting, you will not be able to fuse the boundaries back together again.)

Normally, you will not need to manually slit a face zone. Two-sided walls are automatically slit, but remain coupled. (This coupling refers only to the grid; it is independent of thermal coupling.) The adaption process treats these coupled walls just like periodic boundaries; adapting on one wall causes the same adaption on the shadow. If you want to adapt one wall independent of its shadow, you should slit the coupled wall to obtain two distinct walls.

figure   

You should not confuse "slitting'' a face zone with "separating'' a face zone. When you slit a face zone, additional faces and nodes are created and placed in a new zone. When you separate a face zone, a new zone will be created, but no new faces or nodes are created; the existing faces and nodes are simply redistributed among the zones.



Inputs for Slitting Face Zones


If you wish to slit a face zone, you can use the slit-face-zone command.

grid $\rightarrow$ modify-zones $\rightarrow$ slit-face-zone

You will specify the face zone's name or ID, and the solver will replace the zone with two zones:

/grid/modify-zones> slfz

face zone id/name [] wall-4


  zone 4 deleted
  face zone 4 created
  face zone 10 created

figure   

Remember to save a new case file (and a data file, if data exist) after slitting faces.


next up previous contents index Previous: 6.8.5 Slitting Periodic Zones
Up: 6.8 Modifying the Grid
Next: 6.8.7 Extruding Face Zones
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