Physics – Fluid Dynamics
Scientific paper
2011-11-11
Physics
Fluid Dynamics
24 pages, 13 figures, Journal of Fluid Mechanics in press
Scientific paper
We present a systematic study of the influence of different forcing types on the statistical properties of supersonic, isothermal turbulence in both the Lagrangian and Eulerian frameworks. We analyse a series of high-resolution, hydrodynamical grid simulations with Lagrangian tracer particles and examine the effects of solenoidal (divergence-free) and compressive (curl-free) forcing on structure functions, their scaling exponents, and the probability density functions of the gas density and velocity increments. Compressively driven simulations show a significantly larger density contrast, a more intermittent behaviour, and larger fractal dimension of the most dissipative structures at the same root mean square Mach number. We show that the absolute values of Lagrangian and Eulerian structure functions of all orders in the integral range are only a function of the root mean square Mach number, but independent of the forcing. With the assumption of a Gaussian distribution for the probability density function of the velocity increments on large scales, we derive a model that describes this behaviour.
Federrath Christoph
Klessen Ralf S.
Konstandin Lukas
Schmidt Wolfram
No associations
LandOfFree
Statistical properties of supersonic turbulence in the Lagrangian and Eulerian frameworks 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 Statistical properties of supersonic turbulence in the Lagrangian and Eulerian frameworks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Statistical properties of supersonic turbulence in the Lagrangian and Eulerian frameworks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-139748