The Heat Transfer in Fluids Interface
The Heat Transfer in Fluids (ht) interface () is used to model heat transfer in fluids by conduction, convection, and radiation. A Fluid model is active by default on all domains. All functionality for including other domain types, such as a solid domain, is also available.
The temperature equation defined in fluid domains corresponds to the convection-diffusion equation that may contain additional contributions like heat sources.
When this version of the physics interface is added, these default nodes are added to the Model Builder: Fluid, Thermal Insulation (the default boundary condition), and Initial Values. Then, from the Physics toolbar, add other nodes that implement, for example, boundary conditions and sources. You can also right-click Heat Transfer in Fluids to select physics features from the context menu.
Physical Model
See Physical Model for a description of the Thickness (2D and 1D axisymmetric components), Cross sectional area (1D components), Cross sectional perimeter (1D components), and Reference temperature settings, and the check boxes available under the Physical Model section.
By default, no check boxes are selected in this version of the interface.
Consistent Stabilization
This section is available by clicking the Show More Options button () and selecting Stabilization. See Consistent Stabilization for more details.
Inconsistent Stabilization
This section is available by clicking the Show More Options button () and selecting Stabilization. See Inconsistent Stabilization for more details.
Discretization
See Discretization for more details.
Temperature
By default, the shape functions used for the temperature in fluids are Linear.
Dependent Variables
See Dependent Variables for details.
See Settings for the Heat Transfer Interface for a description of all the settings.
In the COMSOL Multiphysics Reference Manual see Table 2-4 for links to common sections and Table 2-5 to common feature nodes. You can also search for information: press F1 to open the Help window or Ctrl+F1 to open the Documentation window.