sergio authored Oct 25, 2017 and Mark OLESEN committed Oct 28, 2017

- Arrhenius viscocity model for incompressible viscocity.

- energyTransport FO for incompressible single and multiple phase
  flows and viscousDissipation fvOption source.

- Tutorial to show the use of energyTransport:
     multiphase/multiphaseInterFoam/laminar/mixerVessel2D

- Tutorial to show viscousDissipation:
     compressible/rhoPimpleFoam/RAS/TJunction