Settings for the Brinkman Equations Interface and the Coupling Feature
When physics interfaces are added using the predefined couplings, specific settings are included with the physics interfaces and the coupling features.
By default in the Settings window for Brinkman Equations, the Compressibility option is set to Weakly compressible flow. The Density ρ in the Porous Medium > Fluid subnode is automatically set to the variable from the Nonisothermal Flow multiphysics coupling feature. Other options for Compressibility are Incompressible flow or Compressible flow (Ma<0.3).
For Heat Transfer in Porous Media in the Porous Medium > Fluid subnode, the Absolute pressure, pA (Model Input section of the Porous Medium > Fluid node) and the Velocity field, u (Heat Convection section) are automatically set to the variables from the Nonisothermal Flow multiphysics coupling feature.
Note that if the physics interfaces are added one at a time, followed by the coupling feature, these modified settings may not be automatically included.
To get all the modified settings presented below automatically, you can right-click the component node, select Add Multiphysics, and add the Nonisothermal Flow coupling feature.
The settings for the interfaces and the coupling feature are described fully under the following links:
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The Nonisothermal Flow, Brinkman Equations Interface in the CFD Module User’s Guide.
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The Brinkman Equations Interface
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The Heat Transfer in Porous Media Interface in the Heat Transfer Module User’s Guide
For more general information on Nonisothermal Flow see
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The Nonisothermal Flow and Conjugate Heat Transfer, Laminar Flow, Turbulent Flow and LES Interfaces in the CFD Module User’s Guide
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Heat Transfer and Fluid Flow Coupling in the Heat Transfer Module User’s Guide
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The Multiphysics Branch in the COMSOL Multiphysics Reference Manual.