Analytical theory of forced rotating sheared turbulence: the parallel case.

Quasi-linear theory of forced rotating sheared turbulence

Rotation and shear flows are an ubiquitous features of many astrophysical and geophysical bodies, playing a crucial role in turbulent transport. To understand the complex dynamics in these systems, we provide a consistent theory of turbulence in the presence of shear and rotation. Starting from a quasi-linear equation for the fluctuating fields, we derive turbulence amplitude and turbulent tran...

Scalings of Inverse Energy Transfer and Energy Decay in 3-D Decaying Isotropic Turbulence with Non-rotating or Rotating Frame of Reference

Energy development of decaying isotropic turbulence in a 3-D periodic cube with non-rotating or rotating frames of reference is studied through direct numerical simulation using GPU accelerated lattice Boltzmann method. The initial turbulence is isotropic, generated in spectral space with prescribed energy spectrum E(κ)~κm in a range between κmin and ...

On the structure and dynamics of sheared and rotating turbulence: Anisotropy properties and geometrical scale-dependent statistics

Analytical theory of forced rotating sheared turbulence

Rotation and shear flows are ubiquitous features of many astrophysical and geophysical bodies. To understand the origin of large-scale shear flow and its effect on turbulent transport in these systems, we consider a forced turbulence and investigate the combined effect of rotation and shear flow on the turbulence properties. Specifically, we study how rotation and flow shear influence the gener...

Distorted turbulence submitted to frame rotation: RDT and LES results

The stability analysis of homogeneous turbulence submitted to mean velocity gradients can be investigated from a pure mathematical point of view by examining the growth of a single Fourier mode as a perturbation to a background flow. The engineering method of studying the same flow is to use Rapid Distortion Theory (RDT) applied to a group of Fourier modes that represent a more "physical" turbu...