Readme.md

Interface Deformation Glyph

Provides a glyph specialized for visualizing interface deformation.

Input

The following input ports are available:

Input	Description	Type	Remark
Grid	Grid containing fields representing fluids in a multiphase setting.	Rectilinear Grid

Grid

The grid contains the following data fields:

Data field	Description	Data	Type	Remark
Interface positions	Field containing the interface barycenter of each interface cell.	Vector	Cell-based
Velocities	Velocity field describing the fluid flow.	Vector	Cell-based	Optional
Stretching direction (minimum)	Direction corresponding to minimum stretching.	Vector	Cell-based	Optional
Stretching direction (maximum)	Direction corresponding to maximum stretching.	Vector	Cell-based	Optional
Bending (minimum)	Minimum bending, where bending values >0 indicate increase in concavity, and values <0 indicate increase in convexity.	Scalar	Cell-based	Optional
Bending (maximum)	Maximum bending, where bending values >0 indicate increase in concavity, and values <0 indicate increase in convexity.	Scalar	Cell-based	Optional
Bending direction (minimum)	Direction corresponding to minimum bending.	Vector	Cell-based	Optional
Bending direction (maximum)	Direction corresponding to maximum bending.	Vector	Cell-based	Optional

The data fields can be considered as optional, however the following constellations are required for different features:

Feature	Required data fields
Velocity glyph	Velocities
Stretching glyph	Stretching direction (minimum and maximum)
Bending glyph	Bending (minimum and maximum), Bending direction (minimum and maximum)

Output

The output is polygonal mesh, represented by a polydata object. It contains the following data fields useful for coloring the glyph:

Data field	Description	Data	Type	Remark
Velocity magnitude	Magnitude of the velocity.	Scalar	Object-based
Stretching (area)	Combined stretching for minimum and maximum (product).	Scalar	Object-based
Bending	Combined bending for minimum and maximum (sum).	Scalar	Object-based