# Test case for the transition of over-resolved disperse to continuous bubbles

## Description

This case tests the number-conservative transition of over-resolved disperse
bubbles to continuous resolved bubbles.

## Technical information

The conversion of disperse to continuous bubbles is realised by combining
three features defined in `phaseProperties`:

1. a cluster tracking algorithm detecting bubbles of mixed morphology,
2. a volume fraction transport step to compress the disperse gas fractions,
3. and the accumulation to continuous procedure.

Note that the compression procedure (step 2) requires `globalBounds true` or a
non-zero `extremaCoeff` in the alpha solution parameters to become effective.

* 2D
* No gravity
* Surface tension switched off between continuous phases
* Cluster tracking
* Volume fraction transport
* AccumulationToContinuous
