Abi-Abdallah Dima, Drochon Agnès, Robin Vincent, Fokapu Odette
Biomechanics and Bioengineering, University of Technology of Compiègne, Compiègne, France.
Comput Methods Biomech Biomed Engin. 2009 Aug;12(4):445-58. doi: 10.1080/10255840802687384.
Blood flow in a steady magnetic field has been of great interest over recent years. Many researchers have examined the effects of magnetic fields on velocity profiles and arterial pressure, and major studies have focused on steady or sinusoidal flows. In this paper, we present a solution for pulsed magnetohydrodynamic blood flow with a somewhat realistic physiological pressure wave obtained using a Windkessel lumped model. A pressure gradient is derived along a rigid vessel placed at the output of a compliant module which receives the ventricle outflow. Then, velocity profile and flow rate expressions are derived in the rigid vessel in the presence of a steady transverse magnetic field. As expected, results showed flow retardation and flattening. The adaptability of our solution approach allowed a comparison with previously addressed flow cases and calculations presented a good coherence with those well established solutions.
近年来,稳定磁场中的血液流动一直备受关注。许多研究人员研究了磁场对速度分布和动脉血压的影响,主要研究集中在稳定流或正弦流上。在本文中,我们给出了一种脉冲磁流体动力学血液流动的解决方案,该方案使用风箱集总模型获得了较为逼真的生理压力波。沿着放置在接收心室流出的顺应性模块输出端的刚性血管导出压力梯度。然后,在存在稳定横向磁场的情况下,推导刚性血管中的速度分布和流量表达式。不出所料,结果显示了流动阻滞和扁平化。我们解决方案方法的适应性使得能够与先前处理的流动情况进行比较,并且计算结果与那些成熟的解决方案具有良好的一致性。