Haemodynamics in a 3D 90-degree bifurcation
2011 (English)In: Proceedings of the ECCOMAS Thematic International Conference on Simulation and Modeling of Biological Flows, Brussels, Belgium, September 21-23, 2011, 2011Conference paper (Refereed)
The transport behaviour of the haematocrit in the larger arteries is important in defining the variations in viscosityof blood. In this study, a finite volume method is used in order to simulate the blood flow and haematocrit transportthrough a large 3D human-like 90-degree bifurcation. The simulations are carried out to investigate the importance ofexplicitly modelling the non-Newtonian viscosity of blood regarding defining the flow. It is expected to be especiallyimportant in the regions surrounding a bifurcation. The main focus is to compare non-Newtonian to Newtonianbehaviour of the flow through important parameters such as pressure losses, mean viscosity variations and bulktransport properties of haematocrit. The study considers a broad range of physiological and pulsatile flow conditions,and displays the importance of modelling blood flow as a non-Newtonian fluid. The results have a relevant impactregarding the possible discrepencies in important physiological parameters such as wall shear stress (WSS), whencoupling the haematocrit field data back to the viscosity models.
Place, publisher, year, edition, pages
Haemodynamics, Blood, Biomechanics, CFD, Bifurcation
Fluid Mechanics and Acoustics
IdentifiersURN: urn:nbn:se:kth:diva-47809OAI: oai:DiVA.org:kth-47809DiVA: diva2:456310
QC 201112132011-12-132011-11-142013-12-06Bibliographically approved