Defining the Solid Boundary and Initial Conditions

Set boundary conditions for the solid region and the initial temperature.

For the independent simulation of the chimney, set the outer boundary to lose heat by convection, and the inner wall boundary to maintain a constant temperature. The OuterSurf boundary is exposed to air at 283 K with a heat transfer coefficient of 0.12 W/m^2-K.

  1. Expand the Regions > Chimney > Boundaries node.
To apply the convection boundary:
  1. Edit the OuterSurf node, and set the following properties:
    Node Property Setting
    Physics Conditions
    Thermal Specification Condition Convection
    Physics Values
    Ambient Temperature Value 283.0 K
    Heat Transfer Coefficient Value 0.12 W/m^2-K

To apply the constant temperature boundary:

  1. Edit the InnerSurf node, and set the following properties:
    Node Property Setting
    Physics Conditions
    Thermal Specification Condition Temperature
    Physics Values
    Static Temperature Value 380.0 K

    Leave the Default boundary as adiabatic.

  2. Select the Continua > Solid > Initial Conditions > Static Temperature node and set Value to 283.0 K.