Nonlinear effects caused by the propagation of large amplitude electrostatic waves in a plasma

1975 ◽  
Vol 26 (5) ◽  
pp. 649-655 ◽  
Author(s):  
M. Bitter ◽  
P. J. Paris
Keyword(s):  
Large Amplitude ◽  
Nonlinear Effects ◽  
Electrostatic Waves

scholarly journals Generation of monochromatic electrostatic waves of large amplitude in a bounded beam–plasma system

1975 ◽  
Vol 14 (3) ◽  
pp. 389-398 ◽  
Author(s):  
M. Bitter ◽  
P. J. Paris
Keyword(s):  
Electron Beam ◽  
Large Amplitude ◽  
Nonlinear Effects ◽  
Plasma System ◽  
Electrostatic Waves ◽  
Beam Plasma ◽  
Resonant Beam ◽  
Bounded Plasma

Monochromatic electrostatic waves of large amplitude were excited by the interaction of an electron beam with a bounded plasma. These waves were identified as resonant beam modes, which are amplified by multiple reflexion in a cavity. Nonlinear effects, such as the generation of harmonies and sidebands, were observed.

Whipping Response of Vessels With Large Amplitude Motions

2006 ◽  
Author(s):  
Nuno Fonseca ◽  
Eduardo Antunes ◽  
Carlos Guedes Soares
Keyword(s):  
Time Domain ◽  
Large Amplitude ◽  
Nonlinear Effects ◽  
Regular Waves ◽  
Structural Dynamic ◽  
Highly Nonlinear ◽  
Large Amplitude Motions ◽  
Structural Dynamic Characteristics ◽  
The Time Domain ◽  
Equations Of Motions

The paper presents a time domain method to calculate the ship responses in heavy weather, including the global structural loads due to whipping. Since large amplitude waves induce nonlinear ship responses, and in particular highly nonlinear vertical structural loads, the equations of motions and structural loads are solved in the time domain. The “partially nonlinear” time domain seakeeping program accounts for the most important nonlinear effects. Slamming forces are given by the contribution of two components: an initial impact due to bottom slamming and flare slamming due to the variation of momentum of the added mass. The hull vibratory response is calculated applying the modal analysis together with direct integration of the differential equations in the time domain. The structural dynamic characteristics of the hull are modeled by a finite element representation of a Timoshenko beam accounting for the shear deformation and rotary inertia. The calculation procedure is applied to a frigate advancing in regular waves. The contribution of whipping loads to the vertical bending moments on the ship structure is assessed by comparing this response with and without the hull vibration.

scholarly journals Resurrecting dead-water phenomenon

2011 ◽  
Vol 18 (2) ◽  
pp. 193-208 ◽  
Author(s):  
M. J. Mercier ◽  
R. Vasseur ◽  
T. Dauxois
Keyword(s):  
Internal Waves ◽  
Large Amplitude ◽  
Experimental Studies ◽  
Nonlinear Effects ◽  
Stratified Fluid ◽  
Nonlinear Internal Waves ◽  
Induced Drag ◽  
Wave Induced ◽  
Dead Water ◽  
Peculiar Phenomenon

Abstract. We revisit experimental studies performed by Ekman on dead-water (Ekman, 1904) using modern techniques in order to present new insights on this peculiar phenomenon. We extend its description to more general situations such as a three-layer fluid or a linearly stratified fluid in presence of a pycnocline, showing the robustness of dead-water phenomenon. We observe large amplitude nonlinear internal waves which are coupled to the boat dynamics, and we emphasize that the modeling of the wave-induced drag requires more analysis, taking into account nonlinear effects. Dedicated to Fridtjöf Nansen born 150 yr ago (10 October 1861).

scholarly journals Large-amplitude electrostatic waves associated with magnetic ramp substructure at Earth's bow shock

2006 ◽  
Vol 33 (15) ◽  
Author(s):  
A. J. Hull ◽  
D. E. Larson ◽  
M. Wilber ◽  
J. D. Scudder ◽  
F. S. Mozer ◽  
...  
Keyword(s):  
Large Amplitude ◽  
Bow Shock ◽  
Electrostatic Waves ◽  
Earth’S Bow Shock

scholarly journals Effect of Roof Impacts on Coupling Between Wave Response and Sloshing in Tanks of LNG-Carriers

2008 ◽  
Author(s):  
Bernard Molin ◽  
Fabien Remy ◽  
Alain Ledoux ◽  
Nicolas Ruiz
Keyword(s):  
Potential Flow ◽  
Large Amplitude ◽  
Flow Model ◽  
Nonlinear Effects ◽  
Free Surfaces ◽  
Irregular Wave ◽  
Experimental Campaign ◽  
Wave Response ◽  
Potential Flow Model ◽  
Good Agreement

An experimental campaign is reported on the wave response of a rectangular barge supporting two rectangular tanks partly filled with water. Flat and chamfered tank roofs are successively tested, at varying heights above the free surfaces inside the tanks. The tests are carried out in irregular wave systems coming from abeam. The measured barge roll and sloshing motions in the tanks are compared with numerical results from a linearized potential flow model. Good agreement is reported in mild seastates. Nonlinear effects, associated with large amplitude sloshing motion and/or roof impacts, are investigated.

The effect of dust grains on the Weibel instability in presence of large amplitude electrostatic waves

2020 ◽  
Vol 27 (4) ◽  
pp. 043702
Author(s):  
Ajay Gahlot ◽  
Suresh C. Sharma ◽  
Jyotsna Sharma
Keyword(s):  
Large Amplitude ◽  
Dust Grains ◽  
Electrostatic Waves ◽  
Weibel Instability
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