elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Investigation of the velocity field in a full-scale model of a cerebral aneurysm

Roloff, Christoph and Bordás, Róbert and Nickl, Rosa and Mátrai, Zsolt and Szaszák, Norbert and Szilárd, Szabó and Thévenin, Dominique (2013) Investigation of the velocity field in a full-scale model of a cerebral aneurysm. International Journal of Heat and Fluid Flow, 43 (10), pp. 212-219. Elsevier. DOI: 10.1016/j.ijheatfluidflow.2013.06.006 ISSN 0142-727X

Full text not available from this repository.

Official URL: http://www.journals.elsevier.com/international-journal-of-heat-and-fluid-flow

Abstract

Due to improved and now widely used imaging methods in clinical surgery practise, detection of unruptured cerebral aneurysms becomes more and more frequent. For the selection and development of a low-risk and highly effective treatment option, the understanding of the involved hemodynamic mechanisms is of great importance. Computational Fluid Dynamics (CFD), in vivo angiographic imaging and in situ experimental investigations of flow behaviour are powerful tools which could deliver the needed information. Hence, the aim of this contribution is to experimentally characterise the flow in a full-scale phantom model of a realistic cerebral aneurysm. The acquired experimental data will then be used for a quantitative validation of companion numerical simulations. The experimental methodology relies on the large-field velocimetry technique PTV (Particle Tracking Velocimetry), processing high speed images of fluorescent tracer particles added to the flow of a blood-mimicking fluid. First, time-resolved planar PTV images were recorded at 4500 fps and processed by a complex, in-house algorithm. The resulting trajectories are used to identify Lagrangian flow structures, vortices and recirculation zones in two-dimensional measurement slices within the aneurysm sac. The instantaneous inlet velocity distribution, needed as boundary condition for the numerical simulations, has been measured with the same technique but using a higher frame rate of 20,000 fps in order to avoid ambiguous particle assignment. From this velocity distribution, the time-resolved volume flow rate has been also derived. In this manner, a direct comparison between numerical simulations and PTV measurements will be possible in the near future, opening the door for highly accurate computational predictions.

Item URL in elib:https://elib.dlr.de/85182/
Document Type:Article
Additional Information:Available online 24 July 2013, October 2013
Title:Investigation of the velocity field in a full-scale model of a cerebral aneurysm
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Roloff, ChristophInstitute of Fluid Dynamics and Thermodynamics, University of Magdeburg ‘‘Otto von Guericke’’, Universitätsplatz 2, 39106 Magdeburg, GermanyUNSPECIFIED
Bordás, RóbertInstitute of Fluid Dynamics and Thermodynamics, University of Magdeburg ‘‘Otto von Guericke’’, Universitätsplatz 2, 39106 Magdeburg, GermanyUNSPECIFIED
Nickl, RosaDepartment of Neuroradiology, University of Magdeburg ‘‘Otto von Guericke’’, Magdeburg, GermanyUNSPECIFIED
Mátrai, ZsoltDepartment of Fluid and Heat Engineering, University of Miskolc, HungaryUNSPECIFIED
Szaszák, NorbertDepartment of Fluid and Heat Engineering, University of Miskolc, HungaryUNSPECIFIED
Szilárd, SzabóDepartment of Fluid and Heat Engineering, University of Miskolc, HungaryUNSPECIFIED
Thévenin, DominiqueInstitute of Fluid Dynamics and Thermodynamics, University of Magdeburg ‘‘Otto von Guericke’’, Universitätsplatz 2, 39106 Magdeburg, GermanyUNSPECIFIED
Date:2013
Journal or Publication Title:International Journal of Heat and Fluid Flow
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:43
DOI :10.1016/j.ijheatfluidflow.2013.06.006
Page Range:pp. 212-219
Publisher:Elsevier
ISSN:0142-727X
Status:Published
Keywords:Cerebral aneurysm; PTV; PIV; Blood flow; Phantom model
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Simulation & Validation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Experimental Methods
Deposited By: Micknaus, Ilka
Deposited On:17 Dec 2013 11:19
Last Modified:06 Sep 2019 15:26

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.