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Oct 13 – 18, 2014
Hotel Park Inn Pribaltiyskaya
Europe/Moscow timezone

Turbulent Elasticity and the Physics of Time Delay

Oct 15, 2014, 2:00 PM
4h 45m
Green 8-9 (Hotel Park Inn Pribaltiyskaya)

Green 8-9

Hotel Park Inn Pribaltiyskaya

Saint Petersburg, Russian Federation
Poster Poster 4

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.
Paper Number TH/P4-16
Country or International Organisation Korea, Republic of

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)

Presentation materials

There are no materials yet.