Measurement and simulation of fluid flow field in the pipe of magnetic capsule robot
Measurement and simulation of fluid flow field in the pipe of magnetic capsule robot
复制标题
磁力胶囊机器人管道内流体流场测量与仿真
DOI：
10.1177/1687814020985953
复制
发表时间：
2020-12-01
影响因子：
2.1
通讯作者：
Xiang, Yanghui
中科院分区：
文献类型：
--
作者：
Tang, Puhua;Liang, Liang;Xiang, Yanghui
采用实验测量和CFD(计算流体力学)相结合的方法，对肠道磁性胶囊机器人管内流体流动特性进行了研究。利用PIV(粒子成像测速)系统对磁控胶囊机器人在一定平移和旋转速度下的流场进行了测量，获得了丰富的流场信息(流线、速度和涡量)。同时，利用CFD软件计算了相应的流场和作用在胶囊机器人上的力，计算值与实验值基本一致。结果表明，磁性胶囊机器人在外加永磁体的驱动下，在充填硅油的管道中做相应的进动运动，运动轨迹呈波浪形。随着管径的增大，胶囊机器人周围的流体流线越稳定，涡量值越小，胶囊机器人正向阻力和阻力矩越小。本文所采用的PIV测量方法和CFD方法可以应用于液体环境中小型胶囊机器人的流场测量和力学分析。
Through the combination of experimental measurement and CFD (computational fluid dynamics) method, the fluid flow characteristics in the pipe of magnetic capsule robot for intestinal tract are studied. The PIV (particle imaging velocimetry) system is used to measure the fluid flow field around the magnetic-controlled capsule robot under certain translational and rotational speeds, and the rich flow field information (streamline, velocity, and vorticity) is obtained. At the same time, the CFD software is used to calculate the corresponding flow field and the force acting on the capsule robot, and the calculated value is basically consistent with the experimental value. The results show that, driven by the external permanent magnet, the magnetic capsule robot makes corresponding precession movement in the pipe filled with silicone oil, and the movement track is wavy. When the pipe diameter is increased, the fluid streamline around the capsule robot is more stable, the vorticity value is smaller, the resistance and resisting moment of the capsule robot in the forward direction become smaller. The PIV measurement method and CFD method used in this paper can be applied to the fluid flow field measurement and mechanical analysis of the smaller size capsule robot in the liquid environment.