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针对现有血流模拟中采用的流体动力学模型计算量大且实时性差的问题,采用不可压缩稳态非牛顿流体模型对血液流动现象进行仿真,提出一种改进的血流模拟数值计算方法.首先根据血液流变性质、仿真的实时性与细节性的要求,选取合适的血流动力学模型;然后根据所选取的动力学模型,对现有的离散方法进行一定的改进,使得离散后方程的计算量符合仿真的实时性要求;最终计算出粒子的运动信息.实验证明,算法能够有效地降低血流数值计算的复杂度,提高血流绘制的效率.
In view of the large computational complexity and poor real-time performance of the hydrodynamic model used in the current blood flow simulation, the non-compressible steady-state non-Newtonian fluid model is used to simulate the blood flow and an improved numerical simulation method of the blood flow simulation is proposed. According to the properties of blood rheology, the real-time and detail requirements of simulation, the suitable hemodynamic model is selected. Then according to the selected dynamic model, some existing discrete methods are improved to make the discrete post-discrete equation Of the computational volume is in line with the real-time requirements of the simulation.Finally, the particle motion information is calculated.Experiments show that the algorithm can effectively reduce the complexity of blood flow numerical calculation and improve the efficiency of blood flow mapping.