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Advances in the simulation of toroidal gyro Landau fluid model turbulence [electronic resource].

Published:
Washington, D.C. : United States. Dept. of Energy, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description:
33 pages : digital, PDF file
Additional Creators:
General Atomic Company, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
The gyro-Landau fluid (GLF) model equations for toroidal geometry have been recently applied to the study ion temperature gradient (ITG) mode turbulence using the 3D nonlinear ballooning mode representation (BMR). The present paper extends this work by treating some unresolved issues conceming ITG turbulence with adiabatic electrons. Although eddies are highly elongated in the radial direction long time radial correlation lengths are short and comparable to poloidal lengths. Although transport at vanishing shear is not particularly large, transport at reverse global shear, is significantly less. Electrostatic transport at moderate shear is not much effected by inclusion of local shear and average favorable curvature. Transport is suppressed when critical E×B rotational shear is comparable to the maximum linear growth rate with only a weak dependence on magnetic shear. Self consistent turbulent transport of toroidal momentum can result in a transport bifurcation at suffciently large r/(Rq). However the main thrust of the new formulation in the paper deals with advances in the development of finite beta GLF models with trapped electron and BMR numerical methods for treating the fast parallel field motion of the untrapped electrons.
Report Numbers:
E 1.99:ga-a--21871
E 1.99: conf-941101--5
conf-941101--5
ga-a--21871
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Other Subject(s):
Note:
Published through SciTech Connect.
12/01/1994.
"ga-a--21871"
" conf-941101--5"
"DE95008387"
Meeting of the Division of Plasma Physics of the American Physical Society, Minneapolis, MN (United States), 7-11 Nov 1994.
Waltz, R.E.; Milovich, J.; Hammett, G.W.; Kerbel, G.D.
Funding Information:
AC02-76CH03073
FG03-92ER54150
W-7405-ENG-48
View MARC record | catkey: 14743147