Description🔗
The surfaceDisplacement
is a boundary condition that provides displacement
fixed by projection onto triSurface. Use in a displacementMotionSolver
as a boundary condition on a pointDisplacement
field.
Usage🔗
The condition requires entries in both the boundary and field files.
Boundary file🔗
<patchName>
{
type patch;
...
}
Field file🔗
<patchName>
{
// Mandatory entries
type surfaceDisplacement;
velocity <vector>;
geometry <dict>;
projectMode <word>;
projectDirection <vector>;
// Optional entries
wedgePlane <label>;
frozenPointsZone <word>;
// Inherited entries
...
}
where:
Property | Description | Type | Required | Default |
---|---|---|---|---|
type |
Type name: surfaceDisplacement
|
word | yes | - |
velocity |
Maximum velocity | vector | yes | - |
geometry |
Dictionary with searchableSurfaces . (usually triSurfaceMeshes in constant/triSurface ) |
word | yes | - |
projectMode |
Projection mode | word | yes | - |
projectDirection |
Projection direction | vector | yes | - |
wedgePlane |
-1 or component to knock out of intersection normal | label | no | -1 |
frozenPointsZone |
Empty or name of pointZone containing points that do not move |
word | no | null |
Options for the projectMode
entry:
Property | Description |
---|---|
NEAREST |
Nearest |
POINTNORMAL |
Intersection with point normal |
FIXEDNORMAL |
Intersection with fixed vector |
The inherited entries are elaborated in:
-
fixedValuePointPatchField.H
- This displacement is then clipped with the specified velocity*deltaT.
- Optionally (intersection only) removes a component (
wedgePlane
) to stay in 2D.
Further information🔗
Tutorial:
Source code:
API:
History:
- Introduced in version 1.6