v2026.11.16174
Reference / Input deck / model / fluid zones / idw transform

idw transform

type: idw transform

Inverse Distance Weighting transform fluid zone.

support radius
float·default 1·> 0

Support radius for interpolation

Guidance: Fluid–structure interaction →
fixed zones
list of int·not set by default

Zones held in place while the moving zones deform.

power
list of float·default [3, 5, 10]

IDW power parameters

Guidance: Fluid–structure interaction →
stencil size
int·not set by default·>= 1

Maximum stencil size (number of nearest neighbors)

n nearest
int·default 100·>= 1

Number of nearest points (legacy alias for stencil_size)

deformation distance
float·default 1·> 0

Maximum deformation distance (IDW specific)

blending stiffness
float·not set by default·0 to 1

Blending stiffness parameter

zonesrequired
list of zone ids·required

Boundary zones the morph moves.

funcrequired
Python function·required·accepts a Python function

Function of the node position giving the deformed position of every surface node, called as f(*, location); it returns the deformed position as three numbers

Guidance: Python functions in the deck →