This is to access the face/edge/point status of the nearest at the
same time to ensure a consistent result.

Using getVolumeType query in distanceSurface, not simple normal
dot-product comparison, fails on edges.

     on (kinematic) turbulent thermal conductivity, kappat and updated tutorial

     on (kinematic) turbulent thermal conductivity, kappat and updated tutorial

     incompressible codes for variable kappat

     Note: to return to 'old' behaviour, use 'type calculated' for walls
     on field kappat