The pseudospectral method is a highly accurate numerical scheme suitable for turbulence simulations. We have developed an open-source code, \textsc{\textsf{Calliope}}, which adopts the P3DFFT library \citep{Pekurovsky2012} to perform fast Fourier transform with two-dimensional (pencil) decomposition of grids. \textsc{\textsf{Calliope}} can solve incompressible magnetohydrodynamics (MHD), isothe...

Herein, hydrodynamic analysis from a large-eddy simulation in Couette–Taylor–Poiseuille (CTP) geometry is numerically investigated. The present inspired by previous experimental work which heat transport phenomena were investigated recovery system devoted to rotary kiln facility. streamwise and spanwise components of the velocity Reynolds stress tensor are firstly validated using an benchmark. ...

We predict the emergence of turbulent scaling in quench dynamics two-dimensional Heisenberg model for a wide range initial conditions and parameters. In isotropic model, we find that spin-spin correlation function exhibits universal consistent with energy cascade. When spin rotational symmetry is broken by an easy-plane exchange anisotropy, dual cascade emergent conserved charge associated to t...

Motivated by the modeling of three-dimensional fluid turbulence, we define and study a class stochastic partial differential equations (SPDEs) that are randomly stirred spatially smooth uncorrelated in time forcing term. To reproduce fractional, more specifically multifractal, regularity nature fully developed these dynamical evolutions incorporate an homogenous pseudo-differential linear opera...

Aims. We aim to assess whether magneto-rotational instability (MRI) can exist in a turbulent state generated by gravitational (GI). investigated the magnetic field saturation and elucidated ability of GI turbulence act as dynamo. Methods. The results were obtained numerical simulations using magnetohydrodynamics code Athena . A sub-routine solve Poisson equation for self-gravity three-dimension...

Binary Bose-Einstein condensates of two distinct atomic species are studied, with interesting effects being verified due to the imbalance masses. We study formation vortices and associated turbulence flows created by stirring mass-imbalanced coupled in miscible regime. consider mixture laboratory frame, confined a pancake-like harmonic trap slightly perturbed elliptically time-dependent periodi...

Lines from HC 3 N and isotopic substituted species in ground and vibrationally excited states produce crowded millimeter and submillimeter wave spectra in the C-rich protoplanetary nebula CRL618. The complete sequence of HC 3 N rotational lines from J=9–8 to J=30–29 has been observed with the IRAM 30m telescope toward this object. Lines from a total of 15 different vibrational states (including...

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We simultaneously measure both spinning and tumbling components of rotation for long near-neutrally buoyant fibers in homogeneous isotropic turbulence. The lengths diameters the measured extend to several orders Kolmogorov length surrounding turbulent flow. Our measurements show that variance rate follows a -4/3 power law scaling with fiber diameter ($d$) is always larger than rate. This behavi...