Visualization of Cross-sectional Shape in Collapsible Tube during Self-excited Oscillation

High-frequency self-excited oscillations in a collapsible-channel flow

High-Reynolds-number asymptotics and numerical simulations are used to describe twodimensional, unsteady, pressure-driven flow in a finite-length channel, one wall of which contains a section of membrane under longitudinal tension. Asymptotic predictions of stability boundaries for small-amplitude, high-frequency, self-excited oscillations are derived in the limit of large membrane tension. The...

Proposal of Fluid Self-excited Oscillation Peculiar to a Flat Ring Tube and Its Application

A novel fluid power actuator called Flat Ring Tube (FRT) is introduced in this paper. The mechanism of FRT is so simple that it only needs a urethane flat tube and water pressure power source. No valves or switches are required. Applying constant water pressure results in periodic oscillation of the tube. The frequency is proportional to the flow rate of water and inversely proportional to the ...

Imaging of the Self-Excited Oscillation of Past a Cavity During Generation of a Flow

Phase Space Distribution Near the Self-Excited Oscillation Threshold

We study the phase space distribution of an optomechanical cavity near the threshold of self-excited oscillation. A fully on-fiber optomechanical cavity is fabricated by patterning a suspended metallic mirror on the tip of the fiber. Optically induced self-excited oscillation of the suspended mirror is observed above a threshold value of the injected laser power. A theoretical analysis based on...

Collapsible 3D Terrains for GIS Visualization