Conjugate heat transfer by using secondary fluid

It is my understanding that in the latest version of Caedium it is possible to use two different fluids in the same simulation. The example "CFD Simulation of a Pitot Tube and Manometer" use both water and air.

In the electronics cooling example, would it be possible to define the heat sinks consisting of a secondary fluid with a very high viscosity? This way the secondary fluid's heat conduction property can be set equal to a real heat sink. Then simulation would include important heat distribution between heat producing components and the liquid cooled surface.

VOF does not support heat transfer

The 2 phase, Volume Of Fluid (VOF) solver in Caedium does not support heat transfer, so the approach you describe would not work.