The Heat Transfer with Surface-to-Surface Radiation Multiphysics Interface
When the predefined Heat Transfer with Surface-to-Surface Radiation interface () is added (found under the Heat Transfer branch () of the Model Wizard or Add Physics windows), it combines the Heat Transfer in Solids and the Surface-to-Surface Radiation interfaces to model heat transfer by conduction, convection, and radiation in transparent media.
Stationary, time-domain, and frequency-domain modeling are supported in all space dimensions.
On the Constituent Physics Interfaces
As a predefined multiphysics coupling, Heat Transfer in Solids and Surface-to-Surface Radiation interfaces are added to the Model Builder. In addition, a Multiphysics node is added, which automatically includes the Heat Transfer with Surface-to-Surface Radiation multiphysics coupling feature.
The Heat Transfer in Solids interface provides features for modeling heat transfer by conduction, convection, and radiation in optically thick media. A Solid model is active by default on all domains. All functionality to include other heat transfer models, like Fluid, is also available.
The Surface-to-Surface Radiation interface provides features to account for thermal radiation as an energy transfer between boundaries and external heat sources where the medium does not participate in the radiation (radiation in transparent media).
As an Add-on Multiphysics Coupling
The Heat Transfer with Surface-to-Surface Radiation multiphysics coupling is also available when there is at least one of each of the following interfaces with the specified model activated:
•
Any version of the Heat Transfer interface, with any model
•
The Surface-to-Surface Radiation interface
Settings for the Physics Interfaces and Coupling Features
When physics interfaces are added using the predefined couplings, specific settings are included with the physics interfaces and the coupling feature.
Table 8-2: Modified Settings for the Heat Transfer with Surface-to-surface Radiation interface
Physics or Coupling Interface
Modified Settings (if Any)
Surface-to-Surface Radiation
In the Model Input section of the Diffuse Surface default feature, the Temperature, T, is automatically set to the variable from the Heat Transfer with Surface-to-Surface Radiation multiphysics coupling feature.
Heat Transfer in Solids
In 2D and 1D axisymmetric components, in the Physical Model section of the interface, the Thickness, dz, is automatically set to the variable from the Heat Transfer with Surface-to-Surface Radiation multiphysics coupling feature.
In1D components, in the Physical Model section of the interface, the Cross sectional area, Ac and the Cross sectional perimeter, Pc, are automatically set to the variables from the Heat Transfer with Surface-to-Surface Radiation multiphysics coupling feature.
Heat Transfer with Surface-to-Surface Radiation
The Heat Transfer in Solids and Surface-to-Surface Radiation interfaces are preselected.
Note that these settings may be overridden if another predefined coupling is added.