Laminar-to-turbulent transition in pulsatile flow through a stenosis

F. Mallinger, D. Drikakis

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Laminar-to-turbulent transition in pulsatile flow through a stenosis is studied by means of three-dimensional numerical simulations. The flow transition is associated with the occurrence of a flow instability initiating in the stenosis region. The instability is manifested by a three-dimensional symmetry-breaking and leads to asymmetric separation and intense swirling motion downstream of the stenosis. The above have profound effects on the wall shear stress (WSS). The simulations reveal that the asymmetric separation is extended several radii downstream of the stenosis with substantial WSS fluctuations, in both space and time, occurring in the poststenotic region.
LanguageEnglish
Pages437-441
Number of pages5
JournalBiorheology
Volume39
Issue number3-4
Publication statusPublished - 2002

Fingerprint

Pulsatile Flow
Pathologic Constriction

Keywords

  • atherosclerosis
  • blood flow
  • instability
  • simulation
  • stenotic vessels
  • laminar-to-turbulent transition
  • pulsatile flow
  • stenosis
  • wall shear stress

Cite this

Mallinger, F., & Drikakis, D. (2002). Laminar-to-turbulent transition in pulsatile flow through a stenosis. Biorheology, 39(3-4), 437-441.
Mallinger, F. ; Drikakis, D. / Laminar-to-turbulent transition in pulsatile flow through a stenosis. In: Biorheology. 2002 ; Vol. 39, No. 3-4. pp. 437-441.
@article{c2c0c1ffebf2417d9be168a270a4c8e0,
title = "Laminar-to-turbulent transition in pulsatile flow through a stenosis",
abstract = "Laminar-to-turbulent transition in pulsatile flow through a stenosis is studied by means of three-dimensional numerical simulations. The flow transition is associated with the occurrence of a flow instability initiating in the stenosis region. The instability is manifested by a three-dimensional symmetry-breaking and leads to asymmetric separation and intense swirling motion downstream of the stenosis. The above have profound effects on the wall shear stress (WSS). The simulations reveal that the asymmetric separation is extended several radii downstream of the stenosis with substantial WSS fluctuations, in both space and time, occurring in the poststenotic region.",
keywords = "atherosclerosis, blood flow, instability, simulation, stenotic vessels, laminar-to-turbulent transition, pulsatile flow, stenosis, wall shear stress",
author = "F. Mallinger and D. Drikakis",
year = "2002",
language = "English",
volume = "39",
pages = "437--441",
journal = "Biorheology",
issn = "0006-355X",
number = "3-4",

}

Mallinger, F & Drikakis, D 2002, 'Laminar-to-turbulent transition in pulsatile flow through a stenosis' Biorheology, vol. 39, no. 3-4, pp. 437-441.

Laminar-to-turbulent transition in pulsatile flow through a stenosis. / Mallinger, F.; Drikakis, D.

In: Biorheology, Vol. 39, No. 3-4, 2002, p. 437-441.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Laminar-to-turbulent transition in pulsatile flow through a stenosis

AU - Mallinger, F.

AU - Drikakis, D.

PY - 2002

Y1 - 2002

N2 - Laminar-to-turbulent transition in pulsatile flow through a stenosis is studied by means of three-dimensional numerical simulations. The flow transition is associated with the occurrence of a flow instability initiating in the stenosis region. The instability is manifested by a three-dimensional symmetry-breaking and leads to asymmetric separation and intense swirling motion downstream of the stenosis. The above have profound effects on the wall shear stress (WSS). The simulations reveal that the asymmetric separation is extended several radii downstream of the stenosis with substantial WSS fluctuations, in both space and time, occurring in the poststenotic region.

AB - Laminar-to-turbulent transition in pulsatile flow through a stenosis is studied by means of three-dimensional numerical simulations. The flow transition is associated with the occurrence of a flow instability initiating in the stenosis region. The instability is manifested by a three-dimensional symmetry-breaking and leads to asymmetric separation and intense swirling motion downstream of the stenosis. The above have profound effects on the wall shear stress (WSS). The simulations reveal that the asymmetric separation is extended several radii downstream of the stenosis with substantial WSS fluctuations, in both space and time, occurring in the poststenotic region.

KW - atherosclerosis

KW - blood flow

KW - instability

KW - simulation

KW - stenotic vessels

KW - laminar-to-turbulent transition

KW - pulsatile flow

KW - stenosis

KW - wall shear stress

UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-0036373898&partnerID=40&md5=5b96460b8aace6ab5df637811b545a6a

M3 - Article

VL - 39

SP - 437

EP - 441

JO - Biorheology

T2 - Biorheology

JF - Biorheology

SN - 0006-355X

IS - 3-4

ER -