Heat Transfer Module

New Functionality in Version 4.2a

• Support for defining external radiations sources when surface-to-surface radiation is used. This option is available in the Heat Transfer physics interface and any physics interface that supports surface-to-surface radiation.

• It is now possible to define radiation on both sides of a boundary when surface-to-surface radiation is used. This option is available in the Heat Transfer physics interface and any physics interface that supports surface-to-surface radiation.

• A new option to constrain temperature on a boundary using a discontinuous Galerkin method. This option is especially useful to prevent oscillations on inlet boundaries where convection is the dominating heat transfer mechanism.

• A new boundary condition, Interior Wall, in the Single-Phase Flow physics interfaces. It makes it possible to define a wall condition between two fluid domains. This is especially useful to model thin walls as boundaries. You no longer need to define a solid domain with a wall boundary condition on both sides, which can result in a dense mesh.

• The convective cooling coefficient for external natural convection has been corrected.

Backward Compatibility vs. 3.5a

K-ω Turbulence Model

The Turbulent Flow, k-ω physics interface is part of the CFD Module in version 4.2a.

Turbulent Flow with Wall Functions and Heat Transfer in Conjugate Heat Transfer

Momentum transport Wall Functions are translated into the revised Wall Functions in 4.2a. The Heat equation Wall Functions are also translated, but the translated formulation uses the default turbulence modeling constants, regardless of the values that were defined in Physics>Scalar Variables in 3.5a.