Publica
Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Multiscale modelling by coupling threedimensional computational fluid dynamics codes with system models
 Ivanyi, P.: Proceedings of the Second International Conference on Parallel, Distributed and Grid Computing for Engineering 2011. Vol.1 : Ajaccio, Corsica, France, 12  15 April 2011 Red Hook, NY: Curran, 2011 (CivilComp proceedings 95) ISBN: 9781617827433 Paper 43, S.628636 
 International Conference on Parallel, Distributed, Grid and Computing for Engineering (PARENG) <2, 2011, Ajaccio> 

 Englisch 
 Konferenzbeitrag 
 Fraunhofer SCAI () 
Abstract
MpCCI provides an application independent interface for the coupling of different simulation codes. This facilitates the interaction with the different software and overcomes the version dependencies as well as the complex hardware requirements. Typical MpCCI applications are fluid structure interaction (FSI) and thermal coupling.
Beside those typical applications a generic solution for multiscale cosimulation has been developed to understand how various simulation models interact with each other and which impact each sub system has on the overall system performance. The MpCCI coupling interface brings together the speed and robustness of the onedimensional system or functional modelling with the complexity of ThreeDimensional Computational Fluid Dynamics (CFD) enabling system CFD code to be used for the calculations of the entire flow system and the CFD to perform detailed computational calculations.
In a concrete example we will show the need and advantages of such a onetothreedimensional combination. The onetothreedimensional CFD cosimulation use case couples a one dimensional model of an aircraft environmental control system (ECS) and three quarters of the aircraft passenger cabin with a three dimensional model of the centre section of the passenger cabin. The centre section of the cabin is modelled using the threedimensional CFD package (Fluent or STARCCM), with the cosimulation middleware MpCCI providing coupling adapters to ensure that twoway, bilateral exchange of boundary parameters between the one and the threedimensional CFD models gives continuity of mass and momentum transfer. Initially the cosimulation server attempts to procure a converged solution with the threedimensional CFD model. Resultant boundary pressures and, or flow rates at the interface to the onedimensional model are exchanged with the onedimensional model so that it may update its solution (generally a quick process) and exchange and update the boundary conditions for the threedimensional CFD model.
Finally we describe the MpCCI setup for a more generic multiscale cosimulation. We will present the new upcoming standard for cosimulation in the area of functional and system modelling: Modelisar FMI. The functional mockup interface (FMI) definition is one result of the ITEA2 project MODELISAR (http://modelisar.org/). The intention is that dynamic system models of different software systems can be used together for softwaremodelhardwareintheloop simulation and for embedded systems. The FMI defines an open interface to be implemented by an executable called functional mockup unit (FMU).