# Test Case for Surface Tension Pair Key Inversion

## Description

This case is a three phase version of the official Grossetete tutorial. The gas
phase was split up into two identical phases with half of the phase fraction.
Test had shown that changing the order of the surfaceTension phase interface had
significant influence on the results. A bug fix was proposed and submitted to
OpenFOAM Foundation.

## Technical Information

See release tutorial.

## Pre-Processing

See release tutorial.

## Post-Processing

The case runs just for 10 time steps, one time with surface tension
(gas1 and liquid) and one time for (liquid and gas1). The results are than
compared and have to be identical.

## Additional Remarks

Case provided by Juho Peltola, VTT Finland.
