# Test for film-Euler Morphology Transfer

## Description

This case tests the mass transfer from the Euler region to the film region,
realised via filmEulerTransfer and EulerFilmTransfer fvModels. It provides an
example of how film morphology can be integrated into the MultiMorph framework.
The case represents a laminar film flow on an inclined plane. Liquid is injected
into the Euler region (solved by the multiphaseEuler solver) and gradually thins
out until the film becomes thin enough to trigger the transfer of liquid to the
film region.

## Technical Information

- 2D domain
- 2 regions
  - Euler region: height 1 mm, length 100 mm
  - film region: height 1 mm, length 100 mm
- 2520 total mesh cells
- mass and momentum transfer
  - only from Euler to film
  - film thickness threshold: 0.5 mm
  - transfer timeScale: 1e-2 s

## Post-Processing

FunctionObjects used at run time:

- residuals (p_rgh)
- probes (Euler: alpha.liquid, p_rgh; film: U, delta)
- graphCell (film: U, delta)
- graphLayerAverage (Euler: alpha.liquid)

Bash script:

- Gnuplot script createGraphs

Reference files are provided in the validation directory.
