> ## 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 |


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