The Curing Reaction Interface
The Curing Reaction (creq) interface () is found under the Heat Transfer>Curing branch () when adding physics interfaces. This interface is intended for modeling the curing of polymers during the heat treatment.
When the Curing Reaction interface is added, three default nodes are added to the Model Builder: a Curing Kinetics node, an Initial Values node, and a No Flux node. Then, from the Physics toolbar, you can add other nodes that implement, for example, boundary conditions. You can also right-click Curing Reaction to select physics features from the context menu.
The interface supports simulation of curing reaction in 1D, 2D, and 3D as well as for axisymmetric components in 2D. The dependent variable is the conversion, cr.
Settings
The Label is the default physics interface name.
The Name is used primarily as a scope prefix for variables defined by the physics interface. Refer to such physics interface variables in expressions using the pattern <name>.<variable_name>. In order to distinguish between variables belonging to different physics interfaces, the name string must be unique. Only letters, numbers, and underscores (_) are permitted in the Name field. The first character must be a letter.
The default Name (for the first physics interface in the model) is creq.
Heat Transfer
Polymer curing is a temperature dependent process. Select the temperature field to use from the Temperature list.
Advanced Settings
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog box. Normally these settings do not need to be changed.
Pseudo Time Stepping
The Use pseudo time stepping for stationary equation form option adds pseudo time derivatives to the equation when the Stationary equation form is used in order to speed up convergence. When selected, a CFL number expression should also be defined. For the default Automatic option, the local CFL number (from the Courant–Friedrichs–Lewy condition) is determined by a PID regulator. For more information, see Pseudo Time Stepping.
Discretization
The Curing Reaction interface uses Discontinuous Lagrange functions with Constant element order.
Dependent Variables
The dependent variable is the conversion, cr. If required, the name of the dependent variable can be edited.