Spectrum and Anomalous Resistivity for the Saturated Parametric Instability

1972 ◽  
Vol 28 (4) ◽  
pp. 218-221 ◽  
Author(s):  
D. F. DuBois ◽  
M. V. Goldman
Keyword(s):  
Parametric Instability ◽  
Anomalous Resistivity

scholarly journals Parametric instability in a free-evolving warped protoplanetary disc

2020 ◽  
Vol 500 (3) ◽  
pp. 4248-4256
Author(s):  
Hongping Deng ◽  
Gordon I Ogilvie ◽  
Lucio Mayer
Keyword(s):  
Wave Equations ◽  
Hydrodynamic Instability ◽  
Parametric Instability ◽  
Low Viscosity ◽  
Crossing Time ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
First Time ◽  
Bending Wave ◽  
Grid Based

ABSTRACT Warped accretion discs of low viscosity are prone to hydrodynamic instability due to parametric resonance of inertial waves as confirmed by local simulations. Global simulations of warped discs, using either smoothed particle hydrodynamics or grid-based codes, are ubiquitous but no such instability has been seen. Here, we utilize a hybrid Godunov-type Lagrangian method to study parametric instability in global simulations of warped Keplerian discs at unprecedentedly high resolution (up to 120 million particles). In the global simulations, the propagation of the warp is well described by the linear bending-wave equations before the instability sets in. The ensuing turbulence, captured for the first time in a global simulation, damps relative orbital inclinations and leads to a decrease in the angular momentum deficit. As a result, the warp undergoes significant damping within one bending-wave crossing time. Observed protoplanetary disc warps are likely maintained by companions or aftermath of disc breaking.

Anomalous Resistivity Associated with Secondary Islands in the Reconnection Region

2012 ◽  
Vol 29 (8) ◽  
pp. 089401 ◽  
Author(s):  
Meng Zhou ◽  
Wei Su ◽  
Xiao-Hua Deng ◽  
Ming Yao
Keyword(s):  
Anomalous Resistivity ◽  
Reconnection Region

Temporal Evolution of a Three-Wave Parametric Instability

1973 ◽  
Vol 31 (19) ◽  
pp. 1190-1193 ◽  
Author(s):  
M. N. Rosenbluth ◽  
R. B. White ◽  
C. S. Liu
Keyword(s):  
Temporal Evolution ◽  
Parametric Instability

Anomalous resistivity of a turbulent plasma

1971 ◽  
Vol 13 (5) ◽  
pp. 399-413 ◽  
Author(s):  
Christian T Dum
Keyword(s):  
Turbulent Plasma ◽  
Anomalous Resistivity

scholarly journals Parametric Instability Rates in Periodically Driven Band Systems

2017 ◽  
Vol 7 (2) ◽  
Author(s):  
S. Lellouch ◽  
M. Bukov ◽  
E. Demler ◽  
N. Goldman
Keyword(s):  
Parametric Instability ◽  
Periodically Driven
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