Modelica Models in Twin Builder
Modelica is an open standard non-proprietary, object-oriented, equation-based language used to model complex physical systems containing, for example, mechanical, electrical, electronic, hydraulic, thermal, control, electric power, or process-oriented subcomponents. The language is standardized and developed by the Modelica Association. The association also supports a large open source library developed in Modelica called the Modelica Standard Library (MSL).
For more information on Modelica, see: http://www.modelica.org.