Vortex-induced vibration of a transversely rotating sphere

Stability of barotropic vortex strip on a rotating sphere

We study the stability of a barotropic vortex strip on a rotating sphere, as a simple model of jet streams. The flow is approximated by a piecewise-continuous vorticity distribution by zonal bands of uniform vorticity. The linear stability analysis shows that the vortex strip becomes stable as the strip widens or the rotation speed increases. When the vorticity constants in the upper and the lo...

a numerical model of vortex-induced vibration on marine risers

the steger and warming flux vector splitting implicit scheme is used to numerically solve two dimensional reynolds averaged navier–stokes (rans) equations governing the vortex induced vibration of a flexible riser laterally supported by a spring and a damper. the k–ε model is used as turbulence model to simulate the turbulent flow in the wake of the riser. to update the new position of the rise...

A Complementary Numerical and Physical Investigation of Vortex-induced Vibration

Results are presented from low Reynolds number experimental investigations of vortex-induced vibration and comparison is made with results from corresponding twoand three-dimensional direct numerical simulations. It is shown that three-dimensional simulations are required to reproduce the response envelope observed experimentally. Phase-averaged contours of spanwise vorticity demonstrate the pr...

Vortex Streets on a Sphere

Vibration Analysis of a Rotating Nanoplate Using Nonlocal Elasticity Theory

The nanostructures under rotation have high promising future to be used in nano-machines, nano-motors and nano-turbines. They are also one of the topics of interests and it is new in designing of rotating nano-systems. In this paper, the scale-dependent vibration analysis of a nanoplate with consideration of the axial force due to the rotation has been investigated. The governing equation and b...