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CONVECTIVE MASS TRANSFER AT THE CAROTID BIFURCATION

机译：颈动脉分叉处的对流传质

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The convective conditions in regions of hemodynamic separation may produce uneven local mass transfer at the arterial wall which may lead to an atherogenic response. This study estimates the potential variation in local mass transfer of oxygen at the human carotid bifurcation under steady flow conditions. The three dimensional separated how at the bifurcation was studied using a computational analysis of the basic conservation equations of mass, momentum, and species. Mass transfer between the blood and the wall was estimated throughout the sinus region for a condition where the concentration at the wall was constant. Flow separation at the carotid bifurcation created a complex concentration held. The mass transfer was five times lower along the outer wall of the carotid sinus than the artery wall immediately upstream or downstream of the sinus. The region of low mass transfer was similar to the region of low shear stress but not identical. This distribution of low mass transfer correlated strongly with intimal thickening as measured previously from human specimens. Quantitative differences in mass transfer at the arterial wall should not be discarded as an important mechanism by which hemodynamics influences atherogenesis at this site of clinical disease. (C) 1997 Elsevier Science Ltd. [References: 24]
机译：血液动力学分离区域中的对流条件可能会在动脉壁产生不均匀的局部传质，从而导致动脉粥样硬化。这项研究估计在稳态流动条件下，人的颈动脉分叉处氧气局部传质的潜在变化。通过对质量，动量和种类的基本守恒方程的计算分析，三维分离了如何在分叉处进行研究。在壁的浓度恒定的情况下，在整个窦区域估计了血液与壁之间的传质。颈动脉分叉处的流分离产生了复杂的浓度。沿颈动脉窦外壁的传质量比紧邻窦的上游或下游的动脉壁低五倍。低传质区域类似于低剪切应力区域，但不相同。低质量转移的这种分布与先前从人体标本测得的内膜增厚密切相关。不应丢弃动脉壁传质的数量差异作为血液动力学影响该临床疾病此部位动脉粥样硬化的重要机制。 （C）1997 Elsevier Science Ltd. [参考：24]

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