Thin Rod
Use this node to define the thermal and radius properties of conductive rods located on edges in a 3D component.
Model Input
This section has fields and values that are inputs to expressions that define material properties. If such user-defined property groups are added, the model inputs appear here.
Volume Reference Temperature
This section is available when a temperature-dependent density defined in a material is used. On the material frame, the density is evaluated onto a reference temperature to ensure mass conservation in the presence of temperature variations. By default the Common model input is used. This corresponds to the variable minput.Tempref, which is set by default to 293.15 K. To edit it, click the Go to Source button (), and in the Default Model Inputs node under Global Definitions, set a value for the Volume reference temperature in the Expression for remaining selection section.
The other options are User defined and all temperature variables from the physics interfaces included in the model.
This model input does not override the Reference temperature Tref set in the Physical Model section of the physics interface, and that is used to evaluate the reference enthalpy, and a reference density for incompressible nonisothermal flows.
Temperature
This section is available when temperature-dependent material properties are used. By default the temperature of the parent interface is used and the section is not editable. To edit the Temperature field, click Make All Model Inputs Editable (). The available options are User defined (default), Common model input (the minput.T variable, set to 293.15 K by default) and all temperature variables from the physics interfaces included in the model. To edit the minput.T variable, click the Go to Source button (), and in the Default Model Inputs node under Global Definitions, set a value for the Temperature in the Expression for remaining selection section.
Thin Rod
The Rod radius rl should be specified.
Heat Conduction
The Thermal conductivity kl should be specified. By default it is taken From material. For User defined select Isotropic, Diagonal, Symmetric, or Full to enter another value or expression.
Thermodynamics
By default the Density ρl and the Heat capacity at constant pressure Cpl values are taken From material. See Material Density in Features Defined in the Material Frame if a temperature-dependent density should be set. For User defined enter other values or expressions.
Line Heat Source — to add an internal heat source, Ql, within the rod.
Temperature (Thin Rod) — to set a prescribed temperature condition on a specified set of points.
Point Heat Flux (Thin Rod) — to add a heat flux through a specified set of points.
Surface-to-Ambient Radiation (Thin Rod) — to add surface-to-ambient radiation at the rod end points.
Location in User Interface
Context Menus
Ribbon
Physics Tab with Heat Transfer, Heat Transfer in Solids, Heat Transfer in Fluids, Heat Transfer in Porous Media, Heat Transfer in Building Materials, or Bioheat Transfer selected: