搜索结果: 1-15 共查到“物理学 Turbulence”相关记录38条 . 查询时间(0.128 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Microphysical and non-thermal processes in the circumgalactic medium: turbulence, magnetic fields and cosmic rays
银河系 周介质 微物理 非热过程 湍流 磁场 宇宙射线
2023/4/18
Multiphase gas structure is ubiquitous in our universe. Recent observations suggest that large quantities of cool (10^4 K) gas are detected in the circumgalactic medium (CGM) of galaxy halos, which ex...
Fusion, which promises practically unlimited, carbon-free energy using the same processes that power the sun, is at the heart of a worldwide research effort that could help mitigate climate change.
Kelvin-Wave Cascade and Decay of Superfluid Turbulence
Kelvin wave distortion vortex line cryogenic superfluid turbulence dynamics
2014/12/20
Kelvin waves (kelvons), the distortion waves on vortex lines, play a key part in the relaxation of superfluid turbulence at low temperatures. We present a weak-turbulence theory of kelvons. We show th...
Scale-Separation Scheme for Simulating Superfluid Turbulence: Kelvin-Wave Cascade
Kelvin from the distorted wave of vortex superfluid turbulence low temperature the numerical simulation of vortex line
2014/12/20
A Kolmogorov-type cascade of Kelvin waves—the distortion waves on vortex lines—plays a key part in the relaxation of superfluid turbulence at low temperatures. We propose an efficient numeric scheme f...
Scanning Superfluid-Turbulence Cascade by its Low-Temperature Cutoff
Kolmogorov low temperature quantization the vortex line density coefficient of friction
2014/12/19
On the basis of a recently proposed scenario of the transformation of the Kolmogorov cascade into the Kelvin-wave cascade, we develop a theory of low-temperature cutoff. The theory predicts a specific...
Kolmogorov and Kelvin-wave cascades of superfluid turbulence at T=0: What lies between
Vorticity quantitative long wave physics super fluid turbulent flow the vortex line
2014/12/19
As long as vorticity quantization remains irrelevant for long-wave physics, superfluid turbulence supports a regime macroscopically identical to the Kolmogorov cascade of a normal liquid. At high enou...
Asymmetric multi-species alignment in drift wave turbulence
Asymmetric multi-species drift wave turbulence Plasma Physics
2012/5/29
Multi species turbulence in inhomogeneous magnetised plasmas is found to exhibit symmetry breaking in the dynamical alignment of a third species with the fluctuating electron density with respect to t...
Magnetic moment non-conservation in magnetohydrodynamic turbulence models
Magnetic moment non-conservation magnetohydrodynamic turbulence models Plasma Physics
2012/4/19
The fundamental assumptions of the adiabatic theory do not apply in presence of sharp field gradients as well as in presence of well developed magnetohydrodynamic turbulence. For this reason in such c...
Rotational diffusion of particles in turbulence
particle-laden fl ows homogeneous turbulence isotropic turbulence multiphase fl ows
2014/4/1
Through laboratory measurements, we compared the rotation of spherical and ellipsoidal particles in
homogeneous, isotropic turbulence. We found that the particles’ angular velocity statistics are wel...
Investigation on the scintillation reduction of elliptical vortex beams propagating in atmospheric turbulence
Atmospheric optics Free-space optical communication
2013/7/3
We numerically investigate the scintillation index of an elliptical vortex beam in both modest turbulence and strong turbulence. Numerical simulations are realized with random phase screen sc...
Experimental investigation on the scintillation index of vortex beams propagating in simulated atmospheric turbulence
Experimental investigation scintillation index vortex beams propagating simulated atmospheric turbulence
2013/7/3
The scintillation index of vortex beam in simu-lated atmospheric turbulence is experimentally investigated.The fluctuation of the intensity can be effectively reduced by vortex beams. In particular, t...
Drift wave turbulence in a dense semiclassical magnetoplasma
Drift wave turbulence semiclassical magnetoplasma Plasma Physics
2011/8/3
Abstract: A semiclassical nonlinear collisional drift wave model for dense magnetized plasmas is developed and solved numerically. The effects of fluid electron density fluctuations associated with qu...
Impurity transport in temperature gradient driven turbulence
Impurity transport temperature gradient driven turbulence Plasma Physics
2011/8/2
Abstract: In the present paper the transport of impurities by TE and ITG mode driven turbulence is studied. Results obtained using a multi-fluid model are compared with quasilinear (QL) and nonlinear ...
On the velocity distribution in homogeneous isotropic turbulence: correlations and deviations from Gaussianity
homogeneous isotropic turbulence deviations Gaussianity Fluid Dynamics
2011/8/1
Abstract: We investigate the single-point probability density function of the velocity in three-dimensional stationary and decaying homogeneous isotropic turbulence. To this end we apply the statistic...
Radiative diagnostics for sub-Larmor scale magnetic turbulence
Radiative diagnostics sub-Larmor scale magnetic turbulence
2011/9/6
Radiative diagnostics of high-energy density plasmas is addressed in this paper. We propose that the radiation produced by energetic particles in small-scale magnetic field turbulence, which can occur...