Why the study?
Does a spiral component in pulsatile blood flow affect static pressure, turbulence intensity, and wall shear stress in a modelled arterial stenosis?
Does a spiral component in pulsatile blood flow affect static pressure, turbulence intensity, and wall shear stress in a modelled arterial stenosis?
Computational fluid dynamics modeling demonstrates that spiral blood flow reduces post-stenotic turbulence and wall shear stress, which may have important implications for vascular pathology.
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Hypothesis-generating for spiral flow in arterial stenosis; prospective validation required before any clinical consideration.
Pulsatile spiral blood flow in a modelled three-dimensional arterial stenosis, with a 75% cross-sectional area reduction, is investigated by using numerical fluid dynamics. Two-equation k-ω model is used for the simulation of the transitional flow with Reynolds numbers 500 and 1000. It is found that the spiral component increases the static pressure in the vessel during the deceleration phase of the flow pulse. In addition, the spiral component reduces the turbulence intensity and wall shear stress found in the post-stenosis region of the vessel in the early stages of the flow pulse. Hence, the findings agree with the results of Stonebridge et al. (2004). In addition, the results of the effects of a spiral component on time-varying flow are presented and discussed along with the relevant pathological issues.
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Linge et al. (2013) studied this question.
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