Exploring the critical Reynolds number for transition in intracranial aneurysms – highly resolved simulations below Kolmogorov scales

Kartik Jain, Kent-André Mardal

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

High fidelity Lattice Boltzmann method based direct numerical simulations were conducted on 12 intracranial aneurysms previously studied in order to explore the critical Reynolds number at which the flow regime transitions from laminar to the one that exhibit high frequency fluctuations in aneurysms. The outcomes of an in-depth space-time refinement study were taken as a basis for the employment of appropriate resolutions. The characteristics of the transitional flow are quantified at resolutions below Kolmogorov micro-scales, and the critical Re is explored for both time-dependent and time- independent inflow. The results within the studied cohort characterize the aneurysm morphology as an initiator of transitional flow, and suggest that the peak systolic conditions of the middle cerebral artery (MCA) are at the border of transition threshold.
Original languageEnglish
Title of host publication4th International Conference on Computational and Mathematical Biomedical Engineering - CMBE2015
EditorsPerumal Nithiarasu, Elisa Budyn
Place of PublicationSwansea, United-Kingdom
PublisherZeta Computational Resources Ltd.
Pages560-563
Number of pages4
DOIs
Publication statusPublished - 2015
Externally publishedYes
Event4th International Conference on Computational and Mathematical Biomedical Engineering, CMBE 2015 - Cachan, France
Duration: 29 Jun 20151 Jul 2015
Conference number: 4

Publication series

NameCMBE Proceedings
PublisherCBME
Volume2015
ISSN (Print)2227-3085
ISSN (Electronic)2227-9385

Conference

Conference4th International Conference on Computational and Mathematical Biomedical Engineering, CMBE 2015
Abbreviated titleCMBE
CountryFrance
CityCachan
Period29/06/151/07/15

Keywords

  • Intracranial aneurysms
  • Lattice Boltzmann method
  • Transitional flow

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