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pro vyhledávání: '"velocity gradient"'
Applying the Velocity Gradient Technique in NGC 1333: Comparison with Dust Polarization Observations
Magnetic fields (B-fields) are ubiquitous in the interstellar medium (ISM), and they play an essential role in the formation of molecular clouds and subsequent star formation. However, B-fields in interstellar environments remain challenging to measu
Externí odkaz:
http://arxiv.org/abs/2410.13350
Autor:
Arun, Rahul, Colonius, Tim
Publikováno v:
J. Fluid Mech. 1000 (2024) R5
The velocity gradient tensor can be decomposed into normal straining, pure shearing and rigid rotation tensors, each with distinct symmetry and normality properties. We partition the strength of turbulent velocity gradients based on the relative cont
Externí odkaz:
http://arxiv.org/abs/2407.08955
Publikováno v:
Acta Phys. Sin., 2014, 63(5): 054704
Based on the analysis of the velocity gradient tensor, we investigate in this paper the physical interpretation and limitations of four vortex criteria: $\omega$, $Q$, $\varDelta$ and $\lambda_{ci}$, and reveal the actual physical meaning of vortex p
Externí odkaz:
http://arxiv.org/abs/2406.02558
The present work elucidates the boundary behaviors of the velocity gradient tensor ($\bm{A}\equiv\bm{\nabla}\bm{u}$) and its principal invariants ($P,Q,R$) for compressible flow interacting with a stationary rigid wall. Firstly, it is found that the
Externí odkaz:
http://arxiv.org/abs/2406.08760
In this study, we apply the Velocity Gradient Technique (VGT) to the merging Centaurus galaxy. We compare gradient maps derived from the PHANGS-ALMA survey using CO emission lines with magnetic field tracings from dust polarization data obtained via
Externí odkaz:
http://arxiv.org/abs/2406.04242
Publikováno v:
Open Plasma Science, Volume 1 - 2024 (October 29, 2024) ops:13628
In magnetized plasmas, a radial gradient of parallel velocity, where parallel refers to the direction of magnetic field, can destabilise an electrostatic mode called Parallel Velocity Gradient (PVG). The theory of PVG has been mainly developed assumi
Externí odkaz:
http://arxiv.org/abs/2405.08472
Complex network analysis methods have been widely applied to nonlinear systems, but applications within fluid mechanics are relatively few. In this paper, we use a network for the Lagrangian dynamics of the velocity gradient tensor (VGT), where each
Externí odkaz:
http://arxiv.org/abs/2405.03589
Understanding the dynamics of the turbulent velocity gradient tensor (VGT) is essential to gain insights into the Navier-Stokes equations and improve small-scale turbulence modeling. However, characterizing the VGT dynamics conditional on all its rel
Externí odkaz:
http://arxiv.org/abs/2404.05453