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Boundary types

Boundary types are set in constant/polyMesh/boundary

Basic types of boundaries in OpenFOAM are shown in following table:

Boundary type

Description

patch

general boundary (e.g. inlet, outlet)

symmetryPlane

symmetry

empty

empty, only for 2D computations

wedge

axis symmetry

cyclic

periodic (cyclic) boundary condition

cyclicAMI

generalized cyclic

wall

rigid wall

processor

inter-processor boundary (parallel computations)

Boundary types are set in constant/polyMesh/boundary

patch Patch condition contains no geometric or topological information about mesh. Typically patch is used for an inlet or an outlet.

symmetryPlane Symmetry plane (mirroring quantity)

empty Empty boundary condition is used for simplified cases (quasi 3D fluid flow)

wedge Axis symmetric computations, see figure .

cyclic Periodic boundary condition for regularly repeating solution (translation, rotation).

cyclicAMI Generalized cyclic, there is no need for meshes to fit each other point to point. Useful for cyclic cases and for connecting meshes consisting of more regions.