Influence of zonal flow and density on resistive drift wave turbulent transport

Zhang, Yanzeng; Krasheninnikov, Sergei I.

doi:10.1063/5.0025861

Influence of zonal flow and density on resistive drift wave turbulent transport

Journal Article · Tue Dec 22 23:00:00 EST 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0025861· OSTI ID:1849549

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Univ. of California, San Diego, La Jolla, CA (United States). Mechanical and Aerospace Engineering Dept.; Univ. of California, San Diego, La Jolla, CA (United States)
Univ. of California, San Diego, La Jolla, CA (United States). Mechanical and Aerospace Engineering Dept.

The generations of zonal flow (ZF) and density (ZD) and their feedback on the resistive drift wave turbulent transport are investigated within the modified Hasegawa-Wakatani model. With proper normalization, the system is only controlled by an effective adiabatic parameter, a, where the ZF dominates the collisional drift wave (DW) turbulence in the adiabatic limit a > 1. By conducting direct numerical simulations, we found that the ZF can significantly reduce the transport by trapping the DWs in the vicinities of its extrema for a > 1, whereas the ZD itself has little impact on the turbulence but can only assist ZF to further decrease the transport by flattening the local plasma density gradient.

View Accepted Manuscript (DOE)

Research Organization:: Univ. of California, San Diego, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: FG02-04ER54739

OSTI ID:: 1849549

Alternate ID(s):: OSTI ID: 1742061

Journal Information:: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 12 Vol. 27; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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