Postprocessing
The Electrical Circuits interface, unlike most of the other physics interfaces, solves for a relatively large number of global dependent variables (such as voltages and currents), instead of solving for a few space-varying fields (such as temperature or displacement). For this reason, the Electrical Circuit interface does not provide default plots when computing a study.
The physics interface defines a number of variables that can be used in postprocessing. All variables defined by the Electrical Circuit interface are of a global scope, and can be evaluated in a
Global Evaluation
node (under
Derived Values
). In addition, the time evolution or dependency on a parameter can be plotted in a
Global
plot (under a
1D Plot Group
node).
The physics interface defines a Node voltage variable for each electrical node in the circuit, with name
cir.v_name
, where
cir
is the physics interface Label and
<name>
is the node Name. For each two-pin component, the physics interface also defines variables containing the voltage across it and the current flowing through it. For resistors it adds a heat source variable as well.
In the
COMSOL Multiphysics Reference Manual:
•
Derived Values, Evaluation Groups, and Tables
and
Global Evaluation
•
Plot Groups and Plots
and
Global
