Abstract Details
| status: | file name: | submitted: | by: |
|---|---|---|---|
| approved | ebrahimi_abstract-3.pdf | 2024-04-12 11:23:34 | Fatima Ebrahimi |
Abstracts
Author: Fatima Ebrahimi
Requested Type: Poster
Submitted: 2024-04-12 11:22:00
Co-authors: R. Hager, A. Kleiner, S. Ku, A. Pankin, B. Sturdevant, J. King, C. Hansen, O. Nelson, C. Paz-Soldan, E. Held, A. Spencer, Y. Liu, C. Zhao, C. Balos, D. Gardner, C. Woodward, M. Day, P. Balaprakash ,Q. Gong, T. Flynn, S. Yoo, S. Madireddy, A. Samaddar,
Contact Info:
Princeton Plasma Physics Laboratory
Stellarator Rd
Princeton, 08543
US
Abstract Text:
The CETOP project is a new SciDAC-5 project for the "Development of High-Fidelity Simulation Capabilities for ELM-free Design", with the overarching objective to develop simulation capability and to perform extended MHD and (drift-gyro) kinetic simulations of non-ELMing (and some ELMing) regime operating points to close gaps in understanding, prediction and optimization of edge stability for an FPP. I will present an overview of the CETOP project, as well as a summary of our initial results. We utilize a hierarchy of models (using M3D-C1, NIMROD, XGC, MARS-K/Q codes) to capture multiscale edge physics. Our objectives are: 1- inclusion of
non-ideals effects, plasma shaping, multi-species and nonlinear physics in extended MHD, 2- coupling of extended MHD, XGC, drift kinetic, including full nonlinear benchmark between extended MHD, gyrokinetics and NIMROD DK, 3- to develop advanced time discretizations and transition to GPU accelerated architectures for our MHD codes to enable higher-fidelity multi-species simulations, 4- to apply ML techniques for extracting reduced-order models, data reduction, and feature extraction to the existing non-ELM database (based on interpolation of data), and to extrapolate to new parameter regimes for ELM-free optimization. The latter will be combined with high fidelity simulations for FPP design optimization. Two extended MHD studies in ELM-free regimes will be presented. First NIMROD, M3D-C1 and MARS-Q benchmark studies of NSTX for the wide-pedestal ELM-free scenarios, have been performed. Our initial
NIMROD results show that toroidal flows play an important role in the onset of marginally stable peeling-ballooning in both MHD and 2-fluid regimes. Second, our linear and nonlinear NIMROD simulations of negative triangularity in DIII-D show a persistent reconnecting global n=1 mode. Work supported by DOE SciDAC program under Award Number DE-AC02-09CH11466.
Comments:
This is part of the CETOP SciDAC project.