Heat transfer is a discipline of thermal engineering that concerns the generation, use, conversion, and exchange of thermal energy and heat between physical systems. For the thermal problems discussed here, the heat equation, which describes the distribution of heat (or variation of temperature though time) , is solved. The temperature is therefore uncoupled from the fluid equations (default) or the Boussinesq approximation may be used to simulate buoyancydriven flows (also known as natural convection).
Potential applications for thermal problems are numerous and include electric resistance heating, radiant heating, evaporators, condensers, air conditioning systems, stamping and in many more conjugate heat transfer applications.
In fluid mechanics, liquid or gas flow through pipes or ducts is commonly used in heating and cooling applications. This test case focuses on the two pipe surface boundary conditions, constant temperature or constant heat flux, which cover the usual extreme cases met in industrial applications (Read more). 

In fluid dynamics, the Boussinesq approximation is used in the field of buoyancydriven flows (also known as natural convection flows). This test cases focuses on the Boussinesq Model validation for convection problems (Read more).  
This test case aims at validatin the Conjugate heat transfer solver (coupling between solid mechanics thermal solver and ICFD solver) both in 2D and 3D using the analytical solutions of conjugate heat transfer problems involving a parallel plane channel or a cylindrical channel with a longitudinally periodic regime for the temperature (Read more). 