The Chemistry (chem) interface (
) is found under the
Chemical Species Transport branch (
) when adding a physics interface.
Many of the fields and nodes described in this section are only made available when either a Reaction or a
Species (or both) subnode is added to the Model Builder. All predefined constants and expressions can be overwritten by user-defined expressions. This makes it possible to go beyond the modeling assumptions set as defaults in this physics interface.
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
chem.
This section sets the Temperature, Pressure, and
Electrode potential (only available with a Battery Design Module, Corrosion Module, Electrochemistry Module, Electrodeposition Module, or Fuel Cell & Electrolyzer Module license) to be used by the current interface. Toggle the
Enable electrode reactions checkbox to enable the Electrode Potential input in the
Model Input section, as well as the
Electrode Reaction and
Electrode Reaction Group features. Use the lists to select a temperature, pressure, or electrode potential defined and announced by another interface in the model. For example, when a heat transfer interface is also included, the temperature solved for is available in the
Temperature list.
For Temperature or
Pressure, you can also select
Common model input to use a globally available common model input. In all three cases, select
User defined to manually define the variable in question.