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Modon Saturation in Collisional Driftwave Turbulence
Author(s) -
Naulin V.,
Spatschek K. H.
Publication year - 1995
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150350105
Subject(s) - adiabatic process , turbulence , physics , instability , nonlinear system , electric field , mechanics , saturation (graph theory) , classical mechanics , electrical resistivity and conductivity , viscosity , statistical physics , quantum mechanics , mathematics , combinatorics
The nonlinear evolution of a collisional driftwave instability is considered. Based on the two‐fluid description with ion viscosity and electric resistivity effects, first two coupled equations are derived. Iterating the latter for nearly adiabatic behaviour and a two‐dimensional geometry, a one‐field description is found which properly takes into account the damping of structures. As demonstrated by numerical simulations, this solves an old problem of collisional driftwave turbulence, since in contrast to previous considerations the unlimited growth of self‐organized structures is stopped.