Mathematics – Logic
Scientific paper
Jun 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sosyr..45..246k&link_type=abstract
Solar System Research, Volume 45, Issue 3, pp.246-263
Mathematics
Logic
Scientific paper
The problem of the influence of vortex helicity on the synergic structuring of cosmic matter in it, as well as the appearance of the effect of negative viscosity in three-dimensional gyrotropic turbulence, were studied in the framework of the fundamental problem of simulating the evolution of a rotating astrophysical nonmagnetic disk - in particular, the accretion disk - surrounding the Sun at the early stage of its existence. The evolution equations for averaged vorticity and vortex helicity, as well as rheological relations for the turbulent flow of heat and asymmetrical tensor of the turbulent stress in helical turbulence, were obtained. The demonstrative dependence of helicity on the rotation velocity, density (temperature) gradients, and turbulent energy of the disk gas was established. The role of helicity in the appearance of the inverse Richardson-Kolmogorov energy cascade from small vortices to larger ones and the related process of the generation of the power-consuming macroscale coherent vortex formations appearing in gyrotropic turbulence at high Reynolds number were discussed. The results of the numerical experiments confirming the real existence of the inverse energy cascade in helical turbulence were analyzed. It was assumed that the relatively long-term decay of turbulence in the solar protoplanet cloud can be due to the absence of the reflective symmetry of the anisotropic field of the turbulent velocities with respect to its equatorial plane. As the concept of the inverse energy cascade in three-dimensional helical turbulence is more and more reliably confirmed in numerical experiments, accounting for this effect affecting the structure and dynamics of the astrophysical nonmagnetic disk becomes important during its simulation.
No associations
LandOfFree
On the simulation of helical turbulence in an astrophysical nonmagnetic disk does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with On the simulation of helical turbulence in an astrophysical nonmagnetic disk, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the simulation of helical turbulence in an astrophysical nonmagnetic disk will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1003573