中文 English

Open topic with navigation

You are here: Tutorials > Cabin Radiation > Setting up the model > Defining Physics and Conditions

Defining Physics and Conditions

The physics and conditions are specified as follows.

Add Modules
  1. Click Select Modules in the Model Panel. The Physical Model Selection dialog box opens.
  2. Select Turbulence in the Available Modules list and click Add.
  3. Select Radiation in the Available Modules list and click Add.
  4. Select Streamline in the Available Modules list and click Add.

  5. Click Close, to close the Physical Model Selection dialog box.

  

Figure 11.132 - Adding modules
Operating Parameters
Flow
  1. Select Flow in the Model Panel as shown in Figure 11.133.
  2. Set the value of Convergence Criterion to 1e-06.
  3. Select Yes for Gravity Force drop-down list.
  4. Enter 0, 0, -9.8 m/s2 for in the Gravity Force list.
  

Figure 11.133 - Flow operating parameters

 

Radiation
  1. Select Radiation in the Model Panel as shown in Figure 11.134.

  2. Select Parallel Source for the Source list.

  3. Enter -1, -0.3, -0.5 for the Direction under Source list.
  4. Enter 500 for Power Density in W/m2.
  

Figure 11.134 - Radiation operating parameters
Boundary Conditions

The boundary conditions are specified as follows.

Inner Walls
  1. Select cabin_front_wall and cabin_inner_wall from the Boundaries list in the Geometric Entities Panel.
  2. Select Convection/Radiation for Heat drop-down list in the Model Tab of Properties Panel.
  3. Select Convection/Radiation for Options drop-down list.
  4. Enter 50 for Exchange Coefficient under the Options drop-down list.
  5. Enter 1 for Emissivity under the Options drop-down list.
  6. Select User Select for Output drop-down list.
  7. Select Yes for Total Flux in Output drop-down list.
  

Figure 11.135 - Inner wall conditions

 

Top Walls
  1. Select cabin_top_wall from the Boundaries list in the Geometric Entities Panel.
  2. Select Convection/Radiation for Heat drop-down list in the Model Tab of Properties Panel.

  3. Select Convection/Radiation for Options drop-down list.

  4. Enter 100 for Exchange Coefficient under the Options drop-down list.
  5. Enter 1 for Emissivity under the Options drop-down list.
  6. Select User Select for Output drop-down list.
  7. Select Yes for Total Flux in Output drop-down list.
  

Figure 11.136 - Top wall conditions

 

Window
  1. Select cabin_window from the Boundaries list in the Geometric Entities Panel.
  2. Select Convection/Radiation for Heat drop-down list in the Model Tab of Properties Panel.

  3. Select Convection for Heat drop-down list.

  4. Enter 200 for Exchange Coefficient under the Options drop-down list.
  5. Select User Select for Output drop-down list.
  6. Select Yes for Total Flux in Output drop-down list.
  7. Select Transparent for Radiation drop-down list
  

Figure 11.137 - Window conditions

 

Table
  1. Select cabin_table from the Boundaries list in the Geometric Entities Panel.
  2. Select Yes for Release Particle drop-down list under Streamline in the Model Tab of Properties Panel.
  3. Select Both for Direction drop-down list
  4. Enter 1 for Number of Particles.
  5. Select Cell Center for Release Position drop-down list.
  

Figure 11.138 - Table conditions

 

Fluid Properties
  1. Select Volumes in the Geometric Entities Panel.
  2. Select Ideal Gas Law under Density drop-down list in the Common list.
  

Figure 11.139 - Fluid properties

 

 Copyright © 2023 Simerics Inc.,