R
R. E. Waltz
Researcher at General Atomics
Publications - 26
Citations - 4214
R. E. Waltz is an academic researcher from General Atomics. The author has contributed to research in topics: Tokamak & Gyroradius. The author has an hindex of 24, co-authored 26 publications receiving 3978 citations.
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Journal ArticleDOI
A gyro-Landau-fluid transport model
R. E. Waltz,G. M. Staebler,William Dorland,William Dorland,Gregory W. Hammett,Gregory W. Hammett,Mike Kotschenreuther,J. A. Konings +7 more
TL;DR: In this paper, a physically comprehensive and theoretically based transport model tuned to three-dimensional (3-D) ballooning mode gyrokinetic instabilities and gyrofluid nonlinear turbulence simulations is formulated with global and local magnetic shear stabilization and E×B rotational shear stabilisation.
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Noncircular, finite aspect ratio, local equilibrium model
TL;DR: In this paper, a tokamak equilibrium model, local to a flux surface, is introduced which is completely described in terms of nine parameters including aspect ratio, elongation, triangularity and safety factor.
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Toroidal gyro‐Landau fluid model turbulence simulations in a nonlinear ballooning mode representation with radial modes
TL;DR: In this article, a Fourier transform of a field line following basis with periodicity in toroidal and poloidal angles is applied to the simulation of ion temperature gradient (ITG) mode turbulence using a novel 3D nonlinear ballooning mode representation.
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Anomalous Transport Scaling in the DIII-D Tokamak Matched by Supercomputer Simulation
Jeff Candy,R. E. Waltz +1 more
TL;DR: Using a newly developed global electromagnetic solver, this work is able to recover via direct simulation the Bohm-like scaling observed in DIII-D L-mode discharges and match, well within experimental uncertainty, the measured energy diffusivities.
Journal ArticleDOI
An Eulerian gyrokinetic-Maxwell solver
Jeff Candy,R. E. Waltz +1 more
TL;DR: In this article, a time-explicit, Eulerian numerical scheme for the solution of the nonlinear gyrokinetic-Maxwell equations is presented, where the treatment of electrons is fully drift-kinetic, transverse electromagnetic fluctuations are included, and profile variation is allowed over an arbitrary radial annulus.