The timeName() function simply returns the dimensionedScalar::name() which holds
the user-time name of the current time and now that timeName() is no longer
virtual the dimensionedScalar::name() can be called directly. The timeName()
function implementation is maintained for backward-compatibility.
Currently these vectors are generated at the same time as the wall-distance field
by the same run-time selected algorithm. This will be changed so that the wall-reflection
vectors are only generated and stored if required.
