> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# CFD Boundary Enum

### Properties

| Id for nTopCL | UI Label                                  |
| ------------- | ----------------------------------------- |
| 0             | interior                                  |
| 1             | wall                                      |
| 2             | pressure-inlet, inlet-vent, intake-fan    |
| 3             | pressure-outlet, exhaust-fan, outlet-vent |
| 4             | symmetry                                  |
| 5             | periodic-shadow                           |
| 6             | press-far-field                           |
| 7             | velocity-inlet                            |
| 8             | periodic                                  |
| 9             | fan, porous-jump, radiator                |
| 10            | mass-flow-inlet                           |
| 11            | interface                                 |
| 12            | parent (hanging node)                     |
| 13            | outflow                                   |
| 14            | axis                                      |