Bitbol M, Quemada D
Biorheology. 1985;22(1):31-42. doi: 10.3233/bir-1985-22103.
We present two phenomenological models describing the flowing erythrocyte orientation rate. The first concerns the onset of a stable orientation in a very dilute erythrocyte suspension. It is based on a simple formula for erythrocyte elongation as a function of shear stress, and we assume that beyond a threshold of elongation, erythrocytes take on a stable orientation, while below this threshold, they have a flipping motion. We extend this model to high hematocrit values assuming that the effect of red cell collisions imposes a random moment to each erythrocyte, shifting it from its stable orientation. We obtain an approximate expression for erythrocyte orientation rate as a function of shear rate and then we compare these results to our experimental data in part III of this series.
我们提出了两个描述流动红细胞取向速率的唯象模型。第一个模型涉及非常稀的红细胞悬浮液中稳定取向的起始。它基于一个简单的公式，该公式将红细胞伸长表示为剪切应力的函数，并且我们假设超过伸长阈值时，红细胞呈现稳定取向，而低于此阈值时，它们具有翻转运动。我们将此模型扩展到高血细胞比容值，假设红细胞碰撞的影响给每个红细胞施加一个随机力矩，使其偏离稳定取向。我们得到了红细胞取向速率作为剪切速率函数的近似表达式，然后将这些结果与本系列第三部分中的实验数据进行比较。
