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Authors:Rüdiger Franke: ABB AG, Germany
Francesco Casella: Politecnico di Milano, Italy
Martin Otter: DLR Institute for Robotics and Mechatronics, Germany
Michael Sielemann: DLR Institute for Robotics and Mechatronics, Germany
Hilding Elmqvist: Dassault Systèmes (Dynasim), Sweden
Mattson Sven Erik: Dassault Systèmes (Dynasim), Sweden
Olsson Hans: Dassault Systèmes (Dynasim), Sweden
Publication title:Stream Connectors – An Extension of Modelica for Device-Oriented Modeling of Convective Transport Phenomena
Conference:Proceedings of the 7th International Modelica Conference, Como, Italy, 20-22 September 2009
Publication type: Abstract and Fulltext
Issue:043
Article No.:012
Abstract:Modelica 3.0 as well as other physical modeling languages have two basic variable types to describe the interaction of physical components: “Potential” (or across) variable and “flow” (or through) variable. It is shown that with these variable types it is not possible to describe in a numerically sound way bidirectional flow of matter. Other alternatives based on signal flow oriented modeling have severe restrictions how components can be connected together.

This fundamental problem is addressed in Modelica 3.1 by introducing a third type of connector variable for physical systems, called stream variable, declared with the prefix stream.

This article motivates and introduces stream variables. Examples are given for their utilization in basic fluid models.

Language:English
Keywords:Thermo-fluid, stream variable, convection, potential/flow variable, across/through variable
Year:2009
No. of pages:14
Pages:108-121
ISBN:978-91-7393-513-5
Series:Linköping Electronic Conference Proceedings
ISSN (print):1650-3686
ISSN (online):1650-3740
File:http://www.ep.liu.se/ecp/043/012/ecp09430078.pdf
Available:2009-12-29
Publisher:Linköping University Electronic Press, Linköpings universitet

REFERENCE TO THIS PAGE
Rüdiger Franke, Francesco Casella, Martin Otter, Michael Sielemann, Hilding Elmqvist, Mattson Sven Erik, Olsson Hans (2009). Stream Connectors – An Extension of Modelica for Device-Oriented Modeling of Convective Transport Phenomena, Proceedings of the 7th International Modelica Conference, Como, Italy, 20-22 September 2009 http://dx.doi.org/10.3384/ecp09430078 (accessed 9/1/2014)