搜索结果: 16-30 共查到“理学 turbulence”相关记录257条 . 查询时间(0.088 秒)
Turbulence in the interstellar medium
Many variables Spectral imaging Observation The interstellar medium. The star gas
2014/12/9
The multivariate technique of principal component analysis (PCA) is a powerful statistical tool with which to describe spectral line imaging observations of the molecular interstellar medium. In parti...
Emissions of Organic Compounds in Surfactant Solutions under Air Turbulence
Volatilization rate Volatilization reduction Surfactants Wind Interface concentration
2016/3/25
The objective of this study was to investigate the effects of surfactants aggregating the gas-liquid interface on the
volatilization rates of the organic compounds. The changes in the overall mass tr...
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...
Theory for the Rotational Deconvolution model of Turbulence with Fractional regularization
Theory the Rotational Deconvolution model Turbulence Fractional regularization Analysis of PDEs
2012/4/16
We introduce a new regularization of the rotational Navier-Stokes equations that we call the Rotational Approximate Deconvolution Model (RADM). We generalize the deconvolution type model, studied by B...
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...
Assessing the Feasibility of Cosmic-Ray Acceleration by Magnetic Turbulence at the Galactic Center
Feasibility Cosmic-Ray Acceleration Magnetic Turbulence the Galactic Center
2012/2/23
The presence of relativistic particles at the center of our galaxy is evidenced by the diffuse TeV emission detected from the inner $\sim$$2^\circ$ of the Galaxy. Although it is not yet entirely clear...
Physical Processes of Interstellar Turbulence
Physical Processes Interstellar Turbulence self-gravity radiative heating
2012/2/23
I discuss the role of self-gravity and radiative heating and cooling in shaping the nature of the turbulence in the interstellar medium (ISM) of our galaxy. The heating and cooling cause it to be high...
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...
The conservative cascade of kinetic energy in compressible turbulence
hydrodynamics methods: numerical turbulence
2011/10/14
The physical nature of compressible turbulence is of fundamental importance in a variety of astrophysical settings. We present the first direct evidence that mean kinetic energy cascades conservativel...
Meridional Asymmetries in Forced Beta-Plane Turbulence
Beta-Plane Turbulence Stochastic Forcing Meridional Asymmetries
2013/3/7
Forced geostrophic turbulence on the surface of a rotating sphere (so called β-plane turbulence) is simulated trough the use of the β-SQG+1 numerical model. Domain occupied by the fluid has a channel ...
The Turbulence Spectrum of Molecular Clouds in the Galactic Ring Survey: A Density-Dependent PCA Calibration
Turbulence Spectrum Molecular Clouds Galactic Ring Survey
2011/10/13
Turbulence plays a major role in the formation and evolution of molecular clouds. The problem is that turbulent velocities are convolved with the density of an observed region. To correct for this con...
Clustered Star Formation in Magnetic Clouds: Properties of Dense Cores Formed in Outflow-Driven Turbulence
Magnetic Clouds: Properties Dense Cores Formed Outflow-Driven Turbulence
2011/10/11
We investigate the physical properties of dense cores formed in turbulent, magnetized, parsec-scale clumps of molecular clouds, using three-dimensional numerical simulations that include protostellar ...
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...