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Special Section: Computational Fluid Mechanics and Fluid–Structure Interaction

A Comparative Study Based on Patient-Specific Fluid-Structure Interaction Modeling of Cerebral Aneurysms

[+] Author and Article Information
Kenji Takizawa

Department of Modern Mechanical Engineering and Waseda Institute for Advanced Study,  Waseda University, 1-6-1 Nishi-Waseda, Shinjuku-ku, Tokyo 169-8050, Japan

Tyler Brummer

Mechanical Engineering,  Rice University - MS 321, 6100 Main Street, Houston, TX 77005

Tayfun E. Tezduyar

Mechanical Engineering,  Rice University - MS 321, 6100 Main Street, Houston, TX 77005tezduyar@rice.edu

Peng R. Chen

Cerebrovascular and Neuro-Endovascular Program, Skull Base Program, Department of Neurosurgery, Mischer Neuroscience Institute,  University of Texas Medical School at Houston, 6400 Fannin, Houston, TX 77030

J. Appl. Mech 79(1), 010908 (Dec 13, 2011) (14 pages) doi:10.1115/1.4005071 History: Received March 02, 2011; Revised May 20, 2011; Published December 13, 2011; Online December 13, 2011

We present an extensive comparative study based on patient-specific fluid-structure interaction (FSI) modeling of cerebral aneurysms. We consider a total of ten cases, at three different locations, half of which ruptured. We use the stabilized space-time FSI technique developed by the Team for Advanced Flow Simulation and Modeling (TAFSM), together with a number of special techniques targeting arterial FSI modeling, which were also developed by the TAFSM. What we look at in our comparisons includes the wall shear stress, oscillatory shear index and the arterial-wall stress and stretch. We also investigate how simpler approaches to computer modeling of cerebral aneurysms perform compared to FSI modeling.

Copyright © 2012 by American Society of Mechanical Engineers
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References

Figures

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Figure 8

Maximum WSS (dyn/cm2 ) in space and time

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Figure 9

Average WSS (dyn/cm2 ) in space and time

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Figure 10

WSS at peak flow for M1MCA

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Figure 11

WSS at peak flow for M2MCA

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Figure 12

WSS at peak flow for M3MCA

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Figure 13

WSS at peak flow for M4MCA

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Figure 14

WSS at peak flow for M5Acom

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Figure 15

WSS at peak flow for M6Acom

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Figure 16

WSS at peak flow for M7Acom

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Figure 17

WSS at peak flow for M8Acom

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Figure 18

WSS at peak flow for M9Basilar

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Figure 29

OSI for M9Basilar

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Figure 30

OSI for M10Basilar

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Figure 31

Maximum stress (kPa) in space and time

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Figure 32

Maximum variation in stress (kPa) in space and time

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Figure 33

Stress at peak pressure for M1MCA

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Figure 34

Stress at peak pressure for M2MCA

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Figure 35

Stress at peak pressure for M3MCA

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Figure 36

Stress at peak pressure for M4MCA

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Figure 37

Stress at peak pressure for M5Acom

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Figure 38

Stress at peak pressure for M6Acom

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Figure 39

Stress at peak pressure for M7Acom

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Figure 40

Stress at peak pressure for M8Acom

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Figure 41

Stress at peak pressure for M9Basilar

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Figure 42

Stress at peak pressure for M10Basilar

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Figure 43

Maximum stretch in space and time

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Figure 44

Stretch at peak pressure for M3MCA

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Figure 45

Stretch at peak pressure for M6Acom

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Figure 46

Stretch at peak pressure for M10Basilar

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Figure 47

Maximum WSS (dyn/cm2) in space and time

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Figure 48

Average WSS (dyn/cm2) in space and time

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Figure 50

RA WSS at peak flow for M5Acom

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Figure 51

PS OSI for M5Acom

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Figure 52

RA OSI for M5Acom

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Figure 54

Structure only stress at peak pressure for M3MCA

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Figure 55

Average stretch in space and time

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Figure 56

Structural mechanics meshes at zero pressure: M1MCA (left) and M1MCA-FS (right)

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Figure 57

Structural mechanics meshes at zero pressure: M3MCA (left) and M3MCA-FS (right)

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Figure 58

Top: Fluid mechanics meshes at starting pressure at the fluid-structure interface. Bottom: Fluid mechanics mesh at the inflow plane. M1MCA (left) and M1MCA-FF (right).

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Figure 59

Top: Fluid mechanics meshes at starting pressure at the fluid-structure interface. Bottom: Fluid mechanics mesh at the inflow plane. M3MCA (left) and M3MCA-FF (right).

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Figure 60

WSS at peak flow for M1MCA-FF

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Figure 61

WSS at peak flow for M3MCA-FF

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Figure 62

OSI for M1MCA-FF

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Figure 63

OSI for M3MCA-FF

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Figure 64

Stress at peak pressure for M1MCA-FS

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Figure 65

Stress at peak pressure for M3MCA-FS

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Figure 1

Sample volumetric flow rate

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Figure 2

Outflow pressure profile corresponding to the sample flow rate shown in Fig. 1

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Figure 3

Arterial lumen geometry obtained from voxel data for the MCA models

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Figure 4

Arterial lumen geometry obtained from voxel data for the Acom models

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Figure 5

Arterial lumen geometry obtained from voxel data for the Basilar models

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Figure 6

Structural mechanics meshes at zero pressure: M3MCA (left), M6Acom (middle), and M10Basilar (right)

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Figure 7

Top: Fluid mechanics meshes at starting pressure at the fluid-structure interface. Bottom: Fluid mechanics mesh at the inflow plane. M3MCA (left), M6Acom (middle), and M10Basilar (right).

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Figure 19

WSS at peak flow for M10Basilar

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Figure 20

Streamlines showing WSS on the dome of the aneurysm for M1MCA at 0.06 s after the peak flow. The maximum WSS on the dome is 19.0 dyn/cm2 .

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Figure 49

PS WSS at peak flow for M5Acom

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Figure 53

Maximum stress (kPa) in space and time

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