Viscous Effects on Nonlinear Double Tearing Mode and Plasmoid Formation in Adjacent Harris Sheets-Reference-Cited by-同舟云学术

Viscous Effects on Nonlinear Double Tearing Mode and Plasmoid Formation in Adjacent Harris Sheets

Published:2023-08-24 Issue:9 Volume:9 Page:205
ISSN:2312-7481
Container-title:Magnetochemistry
language:en
Short-container-title:Magnetochemistry

Author:

Ahmad Nisar¹,Zhu Ping²³,Shen Chao¹^ORCID,Ali Ahmad⁴,Zeng Shiyong⁵

Affiliation:

1. College of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China

2. International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

3. Department of Engineering Physics, University of Wisconsin-Madison, Madison, WI 53706, USA

4. Pakistan Tokamak Plasma Research Institute, Islamabad 3329, Pakistan

5. Department of Plasma Physics and Fusion Engineering, University of Science and Technology of China, Hefei 230026, China

Abstract

In this paper, we study the effects of viscosity on the evolution of the double tearing mode (DTM) in a pair of adjacent Harris sheets based on the resistive MHD model in the NIMROD code. Similar to the tearing mode in the conventional single Harris sheet, a transition is observed in the generation of both normal and monster plasmoids at Prandtl number Pr=1. In the Pr<1 regime of the DTM, normal plasmoids (small plasmoids) are generated along with monster plasmoid, whereas in the single tearing mode (STM) cases, such a generation is not observed. When Pr is above the critical value, the generation of monster plasmoid is halted. Correspondingly, in the Pr<1 regime, a quadrupolar flow advects along the poloidal direction, but in the Pr>1 regime this flow advection is inhibited.

Funder

National Natural Science Foundation of China

National Key Research and Development Program of China

Fundamental Research Funds for the Central Universities at Huazhong University of Science and Technology

National Magnetic Confinement Fusion Science Program of China

U.S.DOE

Publisher

MDPI AG

Subject

Materials Chemistry,Chemistry (miscellaneous),Electronic, Optical and Magnetic Materials

Link

https://www.mdpi.com/2312-7481/9/9/205/pdf

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