Models define the primary variables of the simulation, including pressure, temperature, velocity, and what mathematical formulation will be used to generate the solution. In this example, the flow is laminar and incompressible. The Segregated Energy model will be used together with the Surface-to Surface Radiation model to determine the temperature field.
As there are two materials (air and glass) present, two regions are required for the analysis. We will need to define two sets of Physics continuum models, each appropriate to a different region. By default, Physics 1 and Physics 2 are automatically created when the mesh is imported. We will use these continua for the fluid and the solid.
Use more appropriate names for the continua.
The Rename dialog will appear.
The air continuum should be edited so that appropriate physical models are selected for the air fluid region.
In the Physics Model Selection dialog the Three Dimensional model is selected by default from the Space group box.
The Physics Model Selection dialog will guide you through the model selection process by showing only the options appropriate to the initial choices made. Using the same technique as in the previous step:
Note regarding selection of radiation models: It is currently necessary to define interfaces and initialize the solution before switching on radiation models using the view factors calculator. Therefore the radiation models are not selected at this stage, but only after basic model selection for the glass continuum and initialization of the solution.
The Physics Model Selection dialog should look as shown below at this stage.
The color of the Air node has turned from gray to blue to indicate that models have been activated.
Now the glass continuum can be edited for the solid region.
In the Model Selection dialog, do the following:
Note regarding selection of radiation models: It is currently necessary to define interfaces and initialize the solution before switching on radiation models using the view factors calculator. Therefore the radiation models are not selected at this stage, but only after initialization of the solution.
The Physics Model Selection dialog should look as shown below at this stage.
The color of the Glass node has turned from gray to shaded gray to indicate that models have been activated for this continuum.
The selected models for the continuum may be reviewed by opening the Glass > Models nodes.
Now the solution will be initialized so that radiation models may subsequently be selected.
Now the radiation models for both continua may be selected.
The Physics Model Selection dialog should look as shown below when you are done.
The Physics Model Selection dialog should look as shown below when you are done.
The selected models for the continua may be reviewed by opening the Air > Models and Glass > Models nodes.
(Initialize Solution) button in the toolbar or use the Solution > Initialize Solution menu item.
(Save) button.