---
title: boundary conditions
section: reference
---

# boundary conditions

Boundary conditions mapped to surface zones.

| Type | What it is |
| --- | --- |
| [wall](/reference/model/boundary-conditions/wall) | Wall boundary condition. |
| [farfield](/reference/model/boundary-conditions/farfield) | Farfield boundary condition. |
| [symmetry](/reference/model/boundary-conditions/symmetry) | Symmetry boundary condition. |
| [inflow](/reference/model/boundary-conditions/inflow) | Pressure-based inflow boundary condition. |
| [outflow](/reference/model/boundary-conditions/outflow) | Pressure-based outflow boundary condition. |
| [interface](/reference/model/boundary-conditions/interface) | Overset interface: this mesh overlaps another and takes its fringe values from it. |