Please use this identifier to cite or link to this item:
http://arks.princeton.edu/ark:/88435/dsp011g05ff76p
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Stoltzfus-Dueck, T | - |
dc.contributor.author | Hornsby, W A | - |
dc.contributor.author | Grosshauser, S R | - |
dc.date.accessioned | 2022-03-09T12:15:58Z | - |
dc.date.available | 2022-03-09T12:15:58Z | - |
dc.date.issued | 2022 | - |
dc.identifier.citation | T. Stoltzfus-Dueck, W. A. Hornsby, and S. R. Grosshauser, 2022, “Gyrokinetic simulations of momentum flux parasitic to free-energy transfer,” Princeton Plasma Physics Laboratory, Princeton University DataSpace | en_US |
dc.identifier.uri | http://arks.princeton.edu/ark:/88435/dsp011g05ff76p | - |
dc.description.abstract | Ion Landau damping interacts with a portion of the E×B drift to cause a non-diffusive outward flux of co-current toroidal angular momentum. Quantitative evaluation of this momentum flux requires nonlinear simulations to determine fL, the fraction of fluctuation free energy that passes through ion Landau damping, in fully developed turbulence. Nonlinear gyrokinetic simulations with the GKW code confirm the presence of the systematic symmetry-breaking momentum flux. For simulations with adiabatic electrons, fL scales inversely with the ion temperature gradient, because only the ion curvature drift can transfer free energy to the electrostatic potential. Although kinetic electrons should in principle relax this restriction, the ion Landau damping measured in collisionless kinetic-electron simulations remained at low levels comparable with ion-curvature-drift transfer, except when magnetic shear was strong. A set of simulations scanning the electron pitch-angle scattering rate showed only a weak variation of fL with the electron collisionality. However, collisional-electron simulations with electron temperature greater than ion temperature unambiguously showed electron-curvature-drift transfer supporting ion Landau damping, leading to a corresponding enhancement of the symmetry-breaking momentum flux. | en_US |
dc.description.tableofcontents | Data underlying the figures of "Gyrokinetic simulations of momentum flux parasitic to free-energy transfer". See README.txt for detailed information on the data, all of which are contained within data.h5. | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | Princeton University. | en_US |
dc.relation.isreferencedby | https://doi.org/10.1063/5.0080368 | en_US |
dc.subject | toroidal rotation | en_US |
dc.subject | tokamak | en_US |
dc.subject | transport | en_US |
dc.subject | intrinsic rotation | en_US |
dc.subject | rotation reversal | en_US |
dc.title | Gyrokinetic simulations of momentum flux parasitic to free-energy transfer | en_US |
dc.type | Dataset | en_US |
pu.depositor | Stoltzfus-Dueck, Timothy | - |
dc.contributor.funder | US Dept. of Energy, Office of Science, Contract DE-AC02-09CH11466 | en_US |
Appears in Collections: | Theory and Computation |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
data.h5 | Data for "Gyrokinetic simulations of momentum flux parasitic to free-energy transfer" | 69.54 kB | HDF5 | View/Download |
README.txt | Descriptions of the data in data.h5, supporting "Gyrokinetic simulations of momentum flux parasitic to free-energy transfer" | 8.71 kB | Text | View/Download |
Items in Dataspace are protected by copyright, with all rights reserved, unless otherwise indicated.