Assessing the impact of turbulent kinetic energy boundary conditions on turbulent flow simulations using computational fluid dynamics

Computational fluid dynamics has been widely used to study hemodynamics, but accurately determining boundary conditions for turbulent blood flow remains challenging. This study aims to investigate the effect of patient-specific turbulence boundary conditions on the accuracy of turbulent flow simulat...

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Bibliographic Details
Published in:Scientific reports 2023-09, Vol.13 (1), p.14638-14638, Article 14638
Main Authors: Jung, Eui Cheol, Lee, Gyu-Han, Shim, Eun Bo, Ha, Hojin
Format: Article
Language:English
Subjects:
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639/166/985
Blood flow
Boundary conditions
Computer applications
Fluid dynamics
Fluid flow
Hemodynamics
Humanities and Social Sciences
Hydrodynamics
Kinetic energy
Measurement techniques
multidisciplinary
Noise levels
Science
Science (multidisciplinary)
Simulation
Stenosis
Turbulence
Velocity
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Summary:Computational fluid dynamics has been widely used to study hemodynamics, but accurately determining boundary conditions for turbulent blood flow remains challenging. This study aims to investigate the effect of patient-specific turbulence boundary conditions on the accuracy of turbulent flow simulation. Using a stenosis model with 50% severity in diameter, the post-stenosis turbulence flow region was simulated with different planes to obtain inlet boundary conditions and simulate downstream flows. The errors of simulated flow fields obtained with turbulence kinetic energy (TKE) boundary data and arbitrary turbulence intensity were compared. Additionally, the study tested various TKE data resolutions and noise levels to simulate experimental environments. The mean absolute error of velocity and TKE was investigated with various turbulence intensities and TKE mapping. While voxel size and signal-to-noise ratio of the TKE data affected the results, simulation with SNR > 5 and voxel size 
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-41324-w