Intrinsic Dissipation Due to Mode Coupling in Two-Dimensional-Material Resonators Revealed Through a Multiscale Approach

2020 ◽  
Vol 14 (3) ◽  
Author(s):  
Subhadeep De ◽  
Arend van der Zande ◽  
Narayana R. Aluru
Keyword(s):  
Mode Coupling ◽  
Multiscale Approach ◽  
Two Dimensional ◽  
Intrinsic Dissipation

scholarly journals Mode coupling and resonance instabilities in quasi-two-dimensional dust clusters in complex plasmas

2014 ◽  
Vol 90 (3) ◽  
Author(s):  
Ke Qiao ◽  
Jie Kong ◽  
Jorge Carmona-Reyes ◽  
Lorin S. Matthews ◽  
Truell W. Hyde
Keyword(s):  
Mode Coupling ◽  
Two Dimensional ◽  
Complex Plasmas

UNIVERSAL PRANDTL NUMBER IN TWO-DIMENSIONAL KRAICHNAN-BATCHELOR TURBULENCE

2008 ◽  
Vol 22 (20) ◽  
pp. 3421-3431
Author(s):  
MALAY K. NANDY
Keyword(s):  
Prandtl Number ◽  
Mode Coupling ◽  
Perturbation Expansion ◽  
Dynamic Scaling ◽  
Two Dimensional ◽  
Turbulent Prandtl Number ◽  
Energy Regime ◽  
Self Consistent ◽  
Prandtl Numbers

We evaluate the universal turbulent Prandtl numbers in the energy and enstrophy régimes of the Kraichnan-Batchelor spectra of two-dimensional turbulence using a self-consistent mode-coupling formulation coming from a renormalized perturbation expansion coupled with dynamic scaling ideas. The turbulent Prandtl number is found to be exactly unity in the (logarithmic) enstrophy régime, where the theory is infrared marginal. In the energy régime, the theory being finite, we extract singularities coming from both ultraviolet and infrared ends by means of Laurent expansions about these poles. This yields the turbulent Prandtl number σ ≈ 0.9 in the energy régime.

Phase Effect on Mode Coupling in Kelvin–Helmholtz Instability for Two-Dimensional Incompressible Fluid

2009 ◽  
Vol 52 (4) ◽  
pp. 694-696 ◽  
Author(s):  
Wang Li-Feng ◽  
Teng Ai-Ping ◽  
Ye Wen-Hua ◽  
Xue Chuang ◽  
Fan Zheng-Feng ◽  
...  
Keyword(s):  
Incompressible Fluid ◽  
Mode Coupling ◽  
Two Dimensional ◽  
Helmholtz Instability ◽  
Phase Effect

Optimized Driver Placement for Array-Driven Flat-Panel Loudspeakers

2017 ◽  
Vol 42 (1) ◽  
pp. 93-104 ◽  
Author(s):  
David A. Anderson ◽  
Michael C. Heilemann ◽  
Mark F. Bocko
Keyword(s):  
Frequency Band ◽  
Mode Coupling ◽  
Dynamic Force ◽  
Two Dimensional ◽  
Flat Panel ◽  
Piezoelectric Patch ◽  
Optimal Force ◽  
Network Method ◽  
Point Forces ◽  
Bending Modes

Abstract The recently demonstrated ‘modal crossover network’ method for flat panel loudspeaker tuning employs an array of force drivers to selectively excite one or more panel bending modes from a spectrum of panel bending modes. A regularly spaced grid of drivers is a logical configuration for a two-dimensional driver array, and although this can be effective for exciting multiple panel modes it will not necessarily exhibit strong coupling to all of the modes within a given band of frequencies. In this paper a method is described to find optimal force driver array layouts to enable control of all the panel bending modes within a given frequency band. The optimization is carried out both for dynamic force actuators, treated as point forces, and for piezoelectric patch actuators. The optimized array layouts achieve similar maximum mode coupling efficiencies in comparison with regularly spaced driver arrays; however, in the optimized arrays all of the modes within a specified frequency band may be independently addressed, which is important for achieving a desired loudspeaker frequency response. Experiments on flat panel loudspeakers with optimized force actuator array layouts show that each of the panel modes within a selected frequency band may be addressed independently and that the inter-modal crosstalk is typically −30 dB or less with non-ideal drivers.

Mode-coupling instability of two-dimensional plasma crystals

2009 ◽  
Vol 16 (8) ◽  
pp. 083706 ◽  
Author(s):  
S. K. Zhdanov ◽  
A. V. Ivlev ◽  
G. E. Morfill
Keyword(s):  
Mode Coupling ◽  
Two Dimensional ◽  
Plasma Crystals ◽  
Mode Coupling Instability

scholarly journals Acoustic-gravity nonlinear structures

2002 ◽  
Vol 9 (3/4) ◽  
pp. 333-339 ◽  
Author(s):  
D. Jovanović ◽  
L. Stenflo ◽  
P. K. Shukla
Keyword(s):  
Gravity Waves ◽  
Mode Coupling ◽  
Shear Flows ◽  
Vortex Structures ◽  
Coupling Mechanism ◽  
Nonlinear Structures ◽  
Two Dimensional ◽  
Acoustic Gravity Waves ◽  
Nonlinear Generation ◽  
Existence Conditions

Abstract. A catalogue of nonlinear vortex structures associated with acoustic-gravity perturbations in the Earth's atmosphere is presented. Besides the previously known Kelvin-Stewart cat's eyes, dipolar and tripolar structures, new solutions having the form of a row of counter-rotating vortices, and several weakly two-dimensional vortex chains are given. The existence conditions for these nonlinear structures are discussed with respect to the presence of inhomogeneities of the shear flows. The mode-coupling mechanism for the nonlinear generation of shear flows in the presence of linearly unstable acoustic-gravity waves, possibly also leading to intermittency and chaos, is presented.

Synchronization of particle motion induced by mode coupling in a two-dimensional plasma crystal

2014 ◽  
Vol 89 (5) ◽  
Author(s):  
L. Couëdel ◽  
S. Zhdanov ◽  
V. Nosenko ◽  
A. V. Ivlev ◽  
H. M. Thomas ◽  
...  
Keyword(s):  
Particle Motion ◽  
Mode Coupling ◽  
Two Dimensional ◽  
Plasma Crystal
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