Speaker
Dr
ZHIBIN GUO
(NUCLEAR FUSION RESEARCH INSTITUTE, DAEJEON, KOREA)
Description
We present a theory of turbulent elasticity---a novel property of drift wave-zonal flow (DW-ZF) turbulence---which follows from the time delay in the response of DWs to ZF. In this work, we: (1) predict and calculate a generic time delay (i.e., a new time scale!) from dynamical first principle; (2) predict zonal shearing wave pattern, in contrast to the dipolar shear layers commonly assumed; (3) calculate the threshold for the onset of limit-cycle-oscillations in the basic predator-prey feedback system, which governs the DW-ZF turbulence. This new insight provides a natural framework for understanding temporally periodic ZF structures in the Dimits shift regime and in the transition from low-confined mode to high-confined mode.
| Country or International Organisation | Korea, Republic of |
|---|---|
| Paper Number | TH/P4-16 |
Primary author
Dr
ZHIBIN GUO
(NUCLEAR FUSION RESEARCH INSTITUTE, DAEJEON, KOREA)
Co-authors
Ozgur Gurcan
(LPP/Ecole Polytechnique/CNRS)
Prof.
Patrick H. Diamond
(NFRI, UCSD)
Dr
Yusuke Kosuga
(Institute for Advanced Study, Kyushu University)
