剪变率与速度梯度的关系

The Relation of Shear Rate and Velocity Gradient

牛顿粘滞定律是血液流变学的基础理论之一,而讨论剪变率与速度梯度的关系以及二者物理意义是至关重要的问题.本文通过讨论二者在粘性流体作层流时的关系式,得出剪变率与速度梯度不仅数值相同而且物理意义也相同的结论.这为临床血液流变性讨论、分析提供了可靠的理论依据.

Newton＇s law of viscosity is one of the basic theory of hemorheology,it is a critical issue that discussing the relationship and the physical meaning of shear rate and velocity gradient.The conclusions of shear rate with the same velocity gradient is not only value but also the physical meaning was obtained,by studying the equation of shear rate and velocity gradient when viscous fluid are laminar conditions,Which provides a reliable theoretical basis for discussion and analysis of clinical hemorheology.