Simulation Research on Micro-Cavity Flow Field Characteristics of Liquid Floating Rotor Gyro

Abstract

The liquid floating rotor gyro is a gyroscope using electrostatic or electromagnetic forces to levitate rotor, and filling rotor-stator cavities with liquid in order to improve stability of motion. Under influence of the relative surface roughness, rotor velocity, dimension of flow field and fluid nature, flow characteristics of cavity flow field vary under different boundary conditions and geometrical conditions. This paper adopts three-dimensional model and periodic boundary conditions to conduct numerical modeling on cavity flow field. Its results show that, with velocity rising, distribution of flow field speed and pressure manifests partial fluctuations in turbulent-flow-intensive area; resistance torque amid rotor rotation is nonlinearly correlated with velocity, whose rules can be obtained through high-order curve fitting.

Orientational Co Nanorod-Enabled Ferromagnetic Hydrogel Actuators with Diverse Hosts

“…However, when the magnetic field rotation speed was higher than 200 rpm, the actuator moved irregularly. This is because the resistance of the rotor rotation in water increases nonlinearly with the increase of the rotating speed . When the magnetic field cannot offset the resistance caused by the high speed, the actuator cannot follow the rotation of the external magnetic field.…”

“…This is because the resistance of the rotor rotation in water increases nonlinearly with the increase of the rotating speed. 44 When the magnetic field cannot offset the resistance caused by the high speed, the actuator cannot follow the rotation of the external magnetic field. In this case, the external magnetic field imposes a chaotic magnetic force on the actuator, leading to the random motion of the actuator.…”

Computational Flow Dynamic Simulation of Micro Flow Field Characteristics Drainage Device Used in the Process of Oil-Water Separation

“…Therefore, it is essential to design a new reasonable safety drainage device. Some automatic or semiautomatic drainage devices were designed and produced [4][5][6][7], but some factors restrict the popularization and application in dehydration field, such as complex system, low reliability, high cost, and safety hazard.…”