Simple flexible wheelset model for low-frequency instability simulations

Simple model for low - frequency guitar function

Eddy-Induced Instability for Low-Frequency Variability

Synoptic eddy–mean flow interaction has been recognized as one of the key sources for extratropical lowfrequency variability. In this paper, the underlying dynamics of this interaction are examined from the perspective of a synoptic eddy-induced dynamic instability. To delineate this instability, a barotropic model is used that is linearized with respect to a stochastic basic flow prescribed wi...

Experimental Investigation of a Low Frequency Instability

L o w f r e q u e n c y osc i l la t ions observed in a m o d i f i e d P I G d i s charge w e r e ident i f i ed as fluctuations o f the e l e c t r o n temperature . T h e s e osc i l la t i ons on ly o c c u r r e d u n d e r cer ta in c o n d i t i o n s ( l o w gas pressure , re lat ive ly h i g h m a g n e t i c field), w h e r e a s at h i g h pressure a n d l o w m a g n e t i c field s...

Low-Frequency Model for Radio-Frequency Absorbers

A simple model is developed to characterize the behavior of radio-frequency absorbers at low frequency. The absorber is represented by a flat, homogeneous, isotropic slab of lossy material, with effective constitutive parameters. These parameters are determined by a fit to measured data. Excellent fits are obtained in the two applications considered. The model is intended for use in the charact...

Low frequency electrostatic instability in a helicon plasma

Recent discoveries in a helicon plasma show a decrease in equilibrium plasma density as magnetic field strength is increased. This can be explained in the framework of a low frequency electrostatic instability. However, quiescent plasma behavior in helicon sources has been hitherto accepted. To verify the existence of an instability, extensive measurements of fluctuating quantities and losses a...