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Non-perturbative models of intermittency in drift-wave turbulence: Towards a probabilistic theory of anomalous transport
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- المؤلفون: Kim, EJ; Kim, EJ; Diamond, PH; Malkov, M; Hahm, TS; Itoh, K; Itoh, SI; Champeaux, S; Gruzinov, I; Gurcan, O; Holland, C; Rosenbluth, MN; Smolyakov, A
- المصدر:
Nuclear Fusion; vol 43, iss 9, 961-968; 0029-5515
- نوع التسجيلة:
Electronic Resource
- الدخول الالكتروني :
https://escholarship.org/uc/item/7mw00474
https://escholarship.org/
- معلومة اضافية
- Publisher Information:
eScholarship, University of California 2003-09-01
- نبذة مختصرة :
Two examples of non-perturbative models of intermittency in drift-wave (DW) turbulence are presented. The first is a calculation of the probability distribution function (PDF) of ion heat flux due to structures in ion temperature gradient turbulence. The instanton calculus predicts the PDF to be a stretched exponential. The second is a derivation of a bi-variate Burgers equation for the evolution of the DW population density in the presence of radially extended streamer flows. The PDF of fluctuation intensity avalanches is determined. The relation of this to turbulence spreading, observed in simulations, is discussed.
- الموضوع:
- Availability:
Open access content. Open access content
public
- Note:
application/pdf
Nuclear Fusion vol 43, iss 9, 961-968 0029-5515
- Other Numbers:
CDLER oai:escholarship.org:ark:/13030/qt7mw00474
qt7mw00474
https://escholarship.org/uc/item/7mw00474
https://escholarship.org/
1367440105
- Contributing Source:
UC MASS DIGITIZATION
From OAIster®, provided by the OCLC Cooperative.
- الرقم المعرف:
edsoai.on1367440105
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