The role of coherent vorticity in turbulent transport in resistive drift-wave turbulence

Details The role of coherent vorticity in turbulent transport in resistive drift-wave turbulence The role of coherent vorticity in turbulent transport in resistive drift-wave turbulence

2011-11-29

arxiv.org/abs/1111.6715v1

Physics of Plasmas 15 (2008) 072305

Physics

Plasma Physics

Scientific paper

10.1063/1.2956640

The coherent vortex extraction method, a wavelet technique for extracting coherent vortices out of turbulent flows, is applied to simulations of resistive drift-wave turbulence in magnetized plasma (Hasegawa-Wakatani system). The aim is to retain only the essential degrees of freedom, responsible for the transport. It is shown that the radial density flux is carried by these coherent modes. In the quasi-hydrodynamic regime, coherent vortices exhibit depletion of the polarization-drift nonlinearity and vorticity strongly dominates strain, in contrast to the quasiadiabatic regime.

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