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Graduate Student Seminar - 11/11/2016

"Simulating Stelarator Microinstabilities and Turbulence with a GPU-based Hybrid Gyrofluid/Gyrokinetic Code"

by Michael Martin

Friday, September 30, 2016 -- 12:00 p.m.
Large Conference Room, 1207 Energy Research Facility

Advisor:  Professor William Dorland

GryfX is a delta-f code that evolves the gyrofluid set of equations, capable of describing turbulence in plasma. GryfX uses refined nonlinear closures, along with the option to evolve the zonal flow modes (integral in the saturation of turbulence) with gyrokinetics. Furthermore, since fluid models require less memory to store than a kinetic model, GryfX is ideally suited and thus written to run on a Graphics Processing Unit (GPU), yielding at least a 1,200 times performance advantage over the gyrokinetic code GS2. In this talk, I will present the first linear and nonlinear benchmarks of GryfX with GS2 in Wendelstein 7-X (W7X) and National Compact Stellarator Experiment (NCSX) stellarator geometries.

For additional information about the IREAP Graduate Student Seminars, contact Peter Megson.

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