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Research Papers: Flows in Complex Systems

Lattice Boltzmann Method for Simulating Disturbed Hemodynamic Characteristics of Blood Flow in Stenosed Human Carotid Bifurcation

[+] Author and Article Information
Xiuying Kang

Physics Department,
Beijing Normal University,
19 Xinwaidajie,
Beijing 100875, China
e-mail: kangxy@bnu.edu.cn

Wenwen Tang

Physics Department, Beijing Normal University,
19 Xinwaidajie,
Beijing 100875, China
e-mail: 1240372166@qq.com

Siyuan Liu

Physics Department,
Beijing Normal University,
19 Xinwaidajie,
Beijing 100875, China
e-mail: 1522061261@qq.com

1Corresponding author.

Contributed by the Fluids Engineering Division of ASME for publication in the JOURNAL OF FLUIDS ENGINEERING. Manuscript received November 18, 2015; final manuscript received June 5, 2016; published online August 11, 2016. Assoc. Editor: John Abraham.

J. Fluids Eng 138(12), 121104 (Aug 11, 2016) (8 pages) Paper No: FE-15-1845; doi: 10.1115/1.4033913 History: Received November 18, 2015; Revised June 05, 2016

The local hemodynamic factor plays a vital role in the formation and progression of atherosclerosis. In this study, we simulated pulsatile flow patterns in the three-dimensional stenosed and normal carotid artery bifurcations throughout a cardiac cycle using the multiple-relaxation-time lattice Boltzmann (MRT-LB) method. Additionally, we investigated the time-varied flow rate and its division ratios between the parent and daughter branches, the multidirectionality of the stress field, and the averaged local energy dissipation rate. The results can be used in computational modeling of carotid artery hemodynamics and further investigation of the relationship between hemodynamics and cardiovascular diseases.

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References

Figures

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Fig. 1

Periodic inlet velocity profile based on the reported experimental data [25]. The three highlighted phases are systolic peak (t1), systolic maximum deceleration phase (t2), and diastolic flow phase (t3).

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Fig. 2

Distributions of WSS at systolic peak, systolic maximum deceleration phase, and diastolic flow phase for the recanalized ((a)–(c)) and stenosed ((d)–(f)) bifurcations

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Fig. 3

Distributions of axial velocity on the four slices at systolic peak, systolic maximum deceleration phase, and diastolic flow phase for the recanalized ((a)–(c)) and stenosed ((d)–(f)) bifurcations

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Fig. 4

Distributions of axial vorticity on the four slices at systolic peak, systolic maximum deceleration phase, and diastolic flow phase for the recanalized ((a)–(c)) and stenosed ((d)–(f)) bifurcations

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Fig. 5

Volumetric flow rate profiles in the common, internal, and external carotids for the recanalized and stenosed bifurcations during a cardiac cycle

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Fig. 6

Time-varied flow division ratios in the internal and external carotid arteries for the recanalized and stenosed carotid arteries

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Fig. 7

Time-varied volumetric outflow/inflow rate ratios for the recanalized and stenosed carotid arteries

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Fig. 8

Distributions of AWSS (a), AOSI (b), TWSS (c), and TOSI (d) on the wall of the recanalized (left) and stenosed (right) carotid bifurcations, respectively

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Fig. 9

Distributions of time-averaged rate of energy dissipation per unit mass in the recanalized (a) and stenosed (b) carotid bifurcations

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