Advances in implementation of the Incompressible Navier-Stokes-Fourier solver with variable material properties

Jan Pech (Czech Academy of Sciences)

Extension of the Incompressible Navier-Stokes Solver is developed for the system coupled with the energy equation. Temperature field is considered as an active quantity, which influences the flow field since the material parameters (dyn. viscosity, density, thermal conductivity) are temperature dependent. A priori, we do not simplify the problem by restricting to a special forms of dependencies between the material properties and temperature. The only restriction of the model is in independence of density on pressure. However, the divergence of the velocity field is considered non-zero as a consequence of the thermal expansion. Current state of development includes full 3D formulation, other features, as is an implementation for homogeneous directions and stabilisation methods, are currently in the process. The solver was already used for simulations of both the natural and forced convection, some exemplary results will be presented.