Numerische Simulation der Strömung in Miniaturkreiselpumpen zur Blutförderung

New operation techniques on patients undergoing cardiovascular surgery or short-term ventricular assistance have lead to the development of a new generation of blood pumps with minimal size. This development is mainly focussed on hydraulic performance and biocompatibility. This thesis covers the assessment of computational fluid dynamics as a tool to investigate fluid dynamics and blood damaging effects within three intravascular micro blood pumps. In the beginning an introduction into computational fluid dynamics is given and the main assumptions with respect to the pump flow are presented. A computational model basing on these assumptions is introduced and requirements regarding grid generation, boundary conditions and further model parameters are discussed. Numerical calculations on this model are performed and analyzed. The results are compared with according experimental data from hydraulic tests and flow visualizations performed on physical blood pump models. Furthermore, the computational model is used to assess potential blood damage induced by the fluid dynamics within the pump. The physiological background of flow induced blood damage is discussed and different methods of damage assessment are presented. The most suitable computational approaches are implemented into the model, evaluated and validated against experimental data. Finally, the main results are summarized and discussed in context.

Grantor dc:publisher

Publikationsserver der RWTH Aachen University

Year dc:date

2002

Author dc:creator

• Apel, Jörn

Contributors dc:contributor

• Rau, Günter

• info:eu-repo/classification/ddc/610
• Medizin
• CFD
• Strömungssimulation
• Blutpumpe
• Blutströmung

Statement dc:rights

• info:eu-repo/semantics/openAccess

Language dc:language

ger

Identifier

https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-120671%22

OAI identifier oai:identifier

oai:publications.rwth-aachen.de:58840