acoustic modes
Instability of vertical and acoustic modes in supersonic round jets
... and acoustic modes but none of them can fully explain the numerical results in previous ...three modes of distur- bance fields are identified in compressible viscous flow: vor- ticity mode, ...
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Full-Vectorial Finite-Element Analysis of Acoustic Modes in Silica Waveguides
... vector acoustic modes in high index contrast silica optical ...the acoustic and optical waveguides also are presented, together with the modal hybridness and modal ...
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On a Nonlinear Dispersion Effect of Geodesic Acoustic Modes
... The nonlinear dispersion relation of the geodesic acoustic modes (GAMs) is investigated for tokamaks with a high safety factor and low magnetic shear. We focus on the Reynolds stress as a nonlinearity, ...
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Shear Layer Driven Acoustic Modes in a Cylindrical Cavity (AIAA 2010 3903)
... order acoustic modes in a cylindrical cavity excited by an external shear ...azimuthal modes can resonate in a cylindrical cavity with similar magnitudes to depth ...cavity modes and the ...
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Localization of acoustic modes in periodic porous silicon structures
... layer (c) keeps the periodicity in thickness but the porosity changes. As it can be clearly seen in measured trans- mission spectrum shown in Figure 3, this results in an acoustic cavity mode at 1.15 GHz within ...
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Dispersion relations of the acoustic modes in divalent liquid metals
... Figure 3. Dispersion relation of the acous- tic mode in liquid Ca. Black circles, open squares and open circles denote the IXS re- sults, peak positions of the current-current cor- relation function and the dynamic ...
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Photospheric high-frequency acoustic power excess in sunspot umbra: signature of magneto-acoustic modes
... generates acoustic wave-packet propagating through magnetic and non-magnetic halves of the simulation ...the acoustic wave generally splits into slow and fast magneto-acoustic ...
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Modification of Symmetry of Poloidal Eigenmode of Geodesic Acoustic Modes
... Recently, zonal flows (ZFs) have attracted much at- tention in plasma research. In particular, ZFs are thought to suppress anomalous transport in toroidal plasmas, and they also play an important role in turbulent ...
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Rigorous analysis of the transverse acoustic modes in optical waveguides by exploiting their structural symmetry
... the acoustic frequency of the fundamental U 11 x mode for k = 17 µm −1 with the mesh division are shown in ...x modes are calcu- lated for a 2 µm × 1 µm Ge-doped silica waveguide and shown in ...the ...
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Role of Flute Modes in the GAMMA10 Tandem Mirror
... other modes (compressible Alfv´en modes, shear Alfv´en modes, and acoustic modes) are unnecessary, because those modes are more stable than flute modes; the Alfv´en ...
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Advancements in Jet Turbulence and Noise Modeling: Accurate One-Way Solutions and Empirical Evaluation of the Nonlinear Forcing of Wavepackets
... creating acoustic radiation in all directions but especially in the downstream direction in the slow-stream (y < ...no acoustic field at ...downstream acoustic modes in the PSE equations ...
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Shear Layer Dynamics of a Cylindrical Cavity for Different Acoustic Resonance Modes
... travelling acoustic wave which reflects from the end to form a standing ...order acoustic modes which are excited above this frequency are ...These modes, once they “cut-on”, have a much more ...
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Active chiral control of GHz acoustic whispering gallery modes
... surface-acoustic modes in more compli- cated WGM ...the acoustic field generated with different asymmetric source shapes, including different radial distributions, would al- low the optimization of ...
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On the effects of rotation on acoustic stellar pulsations: validity domains of perturbative methods and close frequency pairs
... Deupree (2008) did comparisons using more realistic models. Once more, the perturbative calculations were polynomial fits to the non- perturbative frequencies. Given the larger error bars on the calcu- lations, ...
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Acousto Diffusive Waves in a Piezoelectric Semiconductor Piezoelectric Sandwich Structure
... optical modes of wave propagation possess small value of attenuation as compared to that of acoustic modes; however the trend gets reversed at small ...optical modes both symmetric and ...
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Coupled mode effects on energy transfer in weakly coupled, two temperature plasmas
... ion acoustic modes and a related redistribution of weight in the dielectric response ...ion acoustic modes and the coupled mode reduction of the energy transfer rates were ...
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Selective excitation of localized spin-wave modes by optically pumped surface acoustic waves
... wave modes in ferromagnetic nanostructures using surface acoustic ...wave modes of the nanowires, and acoustic modes of the substrate, and we observe that when the frequencies of these ...
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Acoustic phonon modes and phononic bandgaps in GaN/AlN nanowire superlattices
... have features of dilatational, torsional, stretching, shear, and flexural modes, respectively. We determined a set of parameters which gives complete phononic bandgaps. The results suggest the realization of the ...
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Optimization of power in the problems of active control of sound
... To conclude the introduction, let us only mention that the area of active control of sound has a rich history of development, both as a chapter of the- oretical acoustics, and in the perspective of many different ...
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A new method to explore the spectral impact of the piriform fossae on the singing voice : Benchmarking using MRI-based 3D-printed vocal tracts
... whose acoustic properties are thought to contribute to the acoustic uniqueness of a voice, by shaping the formants F3, F4 and F5, with large inter-speaker variations and small intra-speaker ...the ...
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