Abstract
A concentric annular flow (CAF) model with a cell-free plasma layer surrounding a continuous core of cells is presented to describe blood flow in small tubes. The pressure-flow behavior calculated from this model agrees very well with experimental results obtained under low Reynold's number conditions. The plasma thickness was found to be constant or independent of shear stress, tube diameter, and feed hematocrit. It was also found that the CAF model can qualitatively predict the Fahraeus effect and quantitatively predict the Fahraeus-Lindqvist effect.
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