High fidelity blood flow in a patient-specific arteriovenous fistula

McCullough, J. W. S.; Coveney, Peter V.

doi:10.48550/arxiv.2012.04639

Cited by 1 publication

(1 citation statement)

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“…Its popularity is due to the simplicity of the involved numerical operations, their locality -ensuring excellent portability to parallel computing architectures -and the relative ease at which complex geometries can be treated [1]. These strengths combined with its ability to model mechano-biological phenomena [2,3], make the LBM a method of choice for the bio-medical community [4,5,6,7,8,9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

Simulation of the FDA Nozzle Benchmark: A Lattice Boltzmann Study

Huang¹,

Noël²,

Berg³

et al. 2022

Preprint

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Background and objective: Contrary to flows in small intracranial vessels, many blood flow configurations such as those found in aortic vessels and aneurysms involve larger Reynolds numbers and, therefore, transitional or turbulent conditions. Dealing with such systems require both robust and efficient numerical methods. Methods:We assess here the performance of a lattice Boltzmann solver with full Hermite expansion of the equilibrium and central Hermite moments collision operator at higher Reynolds numbers, especially for under-resolved simulations.To that end the food and drug administration's benchmark nozzle is considered at three different Reynolds numbers covering all regimes: 1) laminar at a Reynolds number of 500, 2) transitional at a Reynolds number of 3500, and 3) low-level turbulence at a Reynolds number of 6500. Results:The lattice Boltzmann results are compared with previously published inter-laboratory experimental data obtained by particle image velocimetry. Our results show good agreement with the experimental measurements throughout the nozzle, demonstrating the good performance of the solver even in under-resolved simulations. Conclusion:In this manner, fast but sufficiently accurate numerical predictions can be achieved for flow configurations of practical interest regarding medical applications.

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