Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms

Julia Olegivna Mikhal; J.C.F Pereira; A. Sequeira; D.J. Lopez Penha; Cornelis H. Slump; J.M.C. Pereira; J. Janela; Bernardus J. Geurts; L. Borges

Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms

Julia Olegivna Mikhal, J.C.F Pereira (Editor), A. Sequeira (Editor), D.J. Lopez Penha, Cornelis H. Slump, J.M.C. Pereira (Editor), J. Janela (Editor), Bernardus J. Geurts, L. Borges (Editor)

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

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Abstract

A volume-penalizing immersed boundary method is presented that facilitates the computation of incompressible fluid flow in complex flow domains. We apply this method to simulate the flow in cerebral aneurysms, and focus on the accuracy with which the flow field and the corresponding shear stress field are computed. The method is applied to laminar, incompressible flow in curved cylindrical vessels and in a model aneurysm. The time-dependent shear stress distributions over the vessel walls are visualized and interpreted in terms of the flow fields that develop. We compute shear stress levels at two different Reynolds numbers, corresponding to a steady and an unsteady flow. In the latter situation strong fluctuations in the shear stress are observed, that may be connected to raised risk-levels of aneurysm rupture.

Original language	English
Title of host publication	Proceedings of the V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010
Editors	J.C.F. Pereira, A. Sequeira, J.M.C. Pereira
Place of Publication	Lisbon
Publisher	Technical University of Lisbon
Number of pages	12
ISBN (Print)	978-989-96778-1-4
Publication status	Published - Jun 2010
Event	5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010 - Lisbon, Portugal Duration: 14 Jun 2010 → 17 Jun 2010 Conference number: 5

Conference

Conference	5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010
Abbreviated title	ECCOMAS ECFD 2010
Country/Territory	Portugal
City	Lisbon
Period	14/06/10 → 17/06/10

Keywords

Volume penalization
Shear stress
Immersed boundary method
Cerebral aneurysm
Incompressible flow

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Mikhal, J. O., Pereira, J. C. F. (Ed.), Sequeira, A. (Ed.), Lopez Penha, D. J., Slump, C. H., Pereira, J. M. C. (Ed.), Janela, J. (Ed.), Geurts, B. J., & Borges, L. (Ed.) (2010). Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms. In J. C. F. Pereira, A. Sequeira, & J. M. C. Pereira (Eds.), Proceedings of the V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010 [01156] Technical University of Lisbon.

Mikhal, Julia Olegivna ; Pereira, J.C.F (Editor) ; Sequeira, A. (Editor) et al. / Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms. Proceedings of the V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010. editor / J.C.F. Pereira ; A. Sequeira ; J.M.C. Pereira. Lisbon : Technical University of Lisbon, 2010.

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title = "Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms",

abstract = "A volume-penalizing immersed boundary method is presented that facilitates the computation of incompressible fluid flow in complex flow domains. We apply this method to simulate the flow in cerebral aneurysms, and focus on the accuracy with which the flow field and the corresponding shear stress field are computed. The method is applied to laminar, incompressible flow in curved cylindrical vessels and in a model aneurysm. The time-dependent shear stress distributions over the vessel walls are visualized and interpreted in terms of the flow fields that develop. We compute shear stress levels at two different Reynolds numbers, corresponding to a steady and an unsteady flow. In the latter situation strong fluctuations in the shear stress are observed, that may be connected to raised risk-levels of aneurysm rupture.",

keywords = "Volume penalization, Shear stress, Immersed boundary method, Cerebral aneurysm, Incompressible flow",

author = "Mikhal, {Julia Olegivna} and J.C.F Pereira and A. Sequeira and {Lopez Penha}, D.J. and Slump, {Cornelis H.} and J.M.C. Pereira and J. Janela and Geurts, {Bernardus J.} and L. Borges",

year = "2010",

month = jun,

language = "English",

isbn = "978-989-96778-1-4",

editor = "J.C.F. Pereira and A. Sequeira and J.M.C. Pereira",

booktitle = "Proceedings of the V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010",

publisher = "Technical University of Lisbon",

note = "5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010, ECCOMAS ECFD 2010 ; Conference date: 14-06-2010 Through 17-06-2010",

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Mikhal, JO, Pereira, JCF (ed.), Sequeira, A (ed.), Lopez Penha, DJ, Slump, CH, Pereira, JMC (ed.), Janela, J (ed.), Geurts, BJ & Borges, L (ed.) 2010, Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms. in JCF Pereira, A Sequeira & JMC Pereira (eds), Proceedings of the V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010., 01156, Technical University of Lisbon, Lisbon, 5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010, Lisbon, Portugal, 14/06/10.

Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms. / Mikhal, Julia Olegivna; Pereira, J.C.F (Editor); Sequeira, A. (Editor) et al.

Proceedings of the V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010. ed. / J.C.F. Pereira; A. Sequeira; J.M.C. Pereira. Lisbon : Technical University of Lisbon, 2010. 01156.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Academic › peer-review

TY - GEN

T1 - Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms

AU - Mikhal, Julia Olegivna

AU - Lopez Penha, D.J.

AU - Slump, Cornelis H.

AU - Geurts, Bernardus J.

A2 - Pereira, J.C.F

A2 - Sequeira, A.

A2 - Pereira, J.M.C.

A2 - Janela, J.

A2 - Borges, L.

A2 - Pereira, J.C.F.

A2 - Sequeira, A.

A2 - Pereira, J.M.C.

N1 - Conference code: 5

PY - 2010/6

Y1 - 2010/6

N2 - A volume-penalizing immersed boundary method is presented that facilitates the computation of incompressible fluid flow in complex flow domains. We apply this method to simulate the flow in cerebral aneurysms, and focus on the accuracy with which the flow field and the corresponding shear stress field are computed. The method is applied to laminar, incompressible flow in curved cylindrical vessels and in a model aneurysm. The time-dependent shear stress distributions over the vessel walls are visualized and interpreted in terms of the flow fields that develop. We compute shear stress levels at two different Reynolds numbers, corresponding to a steady and an unsteady flow. In the latter situation strong fluctuations in the shear stress are observed, that may be connected to raised risk-levels of aneurysm rupture.

AB - A volume-penalizing immersed boundary method is presented that facilitates the computation of incompressible fluid flow in complex flow domains. We apply this method to simulate the flow in cerebral aneurysms, and focus on the accuracy with which the flow field and the corresponding shear stress field are computed. The method is applied to laminar, incompressible flow in curved cylindrical vessels and in a model aneurysm. The time-dependent shear stress distributions over the vessel walls are visualized and interpreted in terms of the flow fields that develop. We compute shear stress levels at two different Reynolds numbers, corresponding to a steady and an unsteady flow. In the latter situation strong fluctuations in the shear stress are observed, that may be connected to raised risk-levels of aneurysm rupture.

KW - Volume penalization

KW - Shear stress

KW - Immersed boundary method

KW - Cerebral aneurysm

KW - Incompressible flow

M3 - Conference contribution

SN - 978-989-96778-1-4

BT - Proceedings of the V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010

PB - Technical University of Lisbon

CY - Lisbon

T2 - 5th European Conference on Computational Fluid Dynamics, ECCOMAS ECFD 2010

Y2 - 14 June 2010 through 17 June 2010

ER -

Mikhal JO, Pereira JCF, (ed.), Sequeira A, (ed.), Lopez Penha DJ, Slump CH, Pereira JMC, (ed.) et al. Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms. In Pereira JCF, Sequeira A, Pereira JMC, editors, Proceedings of the V European Conference on Computational Fluid Dynamics, ECCOMAS CFD 2010. Lisbon: Technical University of Lisbon. 2010. 01156

Immersed boundary method predictions of shear stresses for different flow topologies occuring in cerebral aneurysms

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