Reference : Methods to Increase the Robustness of Finite-Volume Flow Models in Thermodynamic Systems
Scientific journals : Article
Engineering, computing & technology : Energy
http://hdl.handle.net/2268/164545
Methods to Increase the Robustness of Finite-Volume Flow Models in Thermodynamic Systems
English
Quoilin, Sylvain mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
Bell, Ian [Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
Desideri, Adriano mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
Dewallef, Pierre mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes de conversion d'énergie pour un dévelop.durable >]
Lemort, Vincent mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Systèmes énergétiques >]
2014
Energies
7
3
1621-1640
Yes
International
[en] finite volumes ; chattering ; two-phase flow ; stiffness ; Modelica
[en] This paper addresses the issues linked to simulation failures during integration in finite-volume flow models, especially those involving a two-phase state. This kind of model is particularly useful when modeling 1D heat exchangers or piping, e.g., in thermodynamic cycles involving a phase change. Issues, such as chattering or stiff systems, can lead to low simulation speed, instabilities and simulation failures. In the particular case of two-phase flow models, they are usually linked to a discontinuity in the density derivative between the liquid and two-phase zones. In this work, several methods to tackle numerical problems are developed, described, implemented and compared. In addition, methods available in the literature are also implemented and compared to the proposed approaches. Results suggest that the robustness of the models can be significantly increased with these different methods, at the price of a small increase of the error in the mass and energy balances.
http://hdl.handle.net/2268/164545
10.3390/en7031621

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
energies-07-01621.pdfPublisher postprint409.39 kBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.