Human blood shear yield stress and its hematocrit dependence
Human blood shear yield stress and its hematocrit dependence
复制标题
人体血液剪切屈服应力及其血细胞比容依赖性
DOI：
10.1122/1.550883
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发表时间：
1998
影响因子：
3.3
通讯作者：
P. Carpentier
中科院分区：
文献类型：
--
作者：
C. Picart;J. Piau;H. Galliard;P. Carpentier
人体血细胞在休息时会在样本上形成一种渗出的物理凝胶。当这种凝胶不断地被大量剪切时，它就会逐渐破裂。它可能会在墙面滑动，这一现象取决于表面的粗糙度。因此，光滑和粗糙的壁面被用来研究血液的流变剪切特性。具有圆柱壁的库埃特型流变仪允许切变率在10−3-10 S−1的范围内变化，红细胞压积在0.53-0.95的范围内变化。用标准硅油进行校正。在低剪切率下用粗糙的墙测得的应力似乎确实趋向于恒定的屈服应力值。切变率为10−3 S−1时的切应力作为血液屈服应力的真实近似值。对于不同的细胞浓度值，测量了该屈服应力。数据进行了拟合，并显示在所研究的红细胞压积范围内与浓度的立方成正比。然而，在...之间的可变性...
Human blood cells build a percolating physical gel all over the sample when at rest. This gel is progressively broken when it is continuously sheared in the bulk. It can slip at the wall, a phenomenon that depends on the roughness of the surface. Hence, smooth and rough walls were used to investigate the rheometrical shear properties of blood. A Couette-type rheometer with cylindrical walls allowed the shear rate to be varied in the range 10−3–10 s−1 and the hematocrit in the range 0.53–0.95. Calibration was performed with standard silicon oil. The stress measured at low shear rates with rough walls seemed, indeed, to tend to a constant yield stress value. The value of the shear stress at the shear rate of 10−3 s−1 was taken as a realistic approximation of the yield stress of blood. This yield stress was measured for different values of cell concentration. Data were fitted and showed to be proportional to the cube of the concentration over the range of hematocrit studied. However, variability between the ...
紧密堆积的红细胞在剪切流中的运动。
影响因子：
1.1
作者：
Secomb,TW;Fischer,TM;Skalak,R
通讯作者：
Skalak,R