弱脉动血管内速度和温度分布特征的研究

The Distribution Characteristics of Velocity and Temperature for Weak Pulsatile Flow in Blood Vessel

运用Boussinesq近似,以直圆管作为血管模型,导出了在弱脉动条件下轴向速度和温度的径向分布。结果表明,温度波动的幅值与脉动频率成反比;当脉动频率增加时,速度和温度剧烈变化的部分将局限在接近管壁的薄层中。

Based on the Boussinesq's approximation and using a straight vascular model, we derive the radial distributions of the axial velocity and the temperature in weak pulsatile flow. The results show that the amplitude of the temperature fluctuation is inverse proportional to pulsatile frequency; with the increasing of the pulsatile frequency, the gradient of velocity and temperature is mainly restricted in the near-wall layers.