The effect of curvature induced broken potential vorticity conservation on drift wave turbulences

doi:10.1088/1361-6587/abe24c

	The effect of curvature induced broken potential vorticity conservation on drift wave turbulences
	Liu, Z. Y.1; Zhang, Y. Z.2; Mahajan, S. M.3
刊名	PLASMA PHYSICS AND CONTROLLED FUSION
	2021-04-01
卷号	63
关键词	drift wave turbulence shear flow tokamak low-high mode transition
ISSN号	0741-3335
DOI	10.1088/1361-6587/abe24c
通讯作者	Liu, Z. Y.(lzy0928@mail.ustc.edu.cn)
英文摘要	The correlation theory of turbulence suppression (Zhang and Mahajan 1993 Phys. Fluids B5 2000) by velocity shear was constructed by invoking the ansatz of potential vorticity conservation (PVC) that holds for relatively simple (slab) models of drift wave turbulence. It is, therefore, surprising that a detailed modern simulation of the H mode pedestal, using the gyrokinetic code GENE (Hatch et al 2018 Plasma Phys. Control. Fusion 60 084003), found 'striking agreement' with the predictions of the analytic model. To understand the reasons for this remarkable agreement, an extended theory that contains finite (magnetic) curvature, and which does not conserve potential vorticity, is developed and 'solved' by calculating an inhomogeneous Green function reflecting the fact that the new system has a potential vorticity source. It is, then, demonstrated that the effect of the broken PVC is insignificant for the normal operation parameters in tokamaks; the correction due to curvature is at the order of (2L(0)/R), where L-0 is the scale length of the local gradient and R is the major radius. The excellent agreement between simulation and slab model 1993 theory is therefore not accidental; the latter can be applied with confidence to the tokamak pedestal.
资助项目	National MCF Energy RD Program[2018YFE0311200] ; National MCF Energy RD Program[2017YFE0301204] ; Natural Science Foundation of China[U1967206] ; Natural Science Foundation of China[11975231] ; National Natural Science Foundation of China (NSFC)[11805203] ; National Natural Science Foundation of China (NSFC)[11775222] ; Key Research Program of Frontier Science CAS[QYZDB-SSW-SYS004] ; U.S. Dept. of Energy[FG02-04ER-54742]
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000619548200001
资助机构	National MCF Energy RD Program ; Natural Science Foundation of China ; National Natural Science Foundation of China (NSFC) ; Key Research Program of Frontier Science CAS ; U.S. Dept. of Energy
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120646]
专题	中国科学院合肥物质科学研究院
通讯作者	Liu, Z. Y.
作者单位	1.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei 230026, Anhui, Peoples R China 2.Chinese Acad Sci, Ctr Magnet Fus Theory, Hefei 230026, Anhui, Peoples R China 3.Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA
推荐引用方式 GB/T 7714	Liu, Z. Y.,Zhang, Y. Z.,Mahajan, S. M.. The effect of curvature induced broken potential vorticity conservation on drift wave turbulences[J]. PLASMA PHYSICS AND CONTROLLED FUSION,2021,63.
APA	Liu, Z. Y.,Zhang, Y. Z.,&Mahajan, S. M..(2021).The effect of curvature induced broken potential vorticity conservation on drift wave turbulences.PLASMA PHYSICS AND CONTROLLED FUSION,63.
MLA	Liu, Z. Y.,et al."The effect of curvature induced broken potential vorticity conservation on drift wave turbulences".PLASMA PHYSICS AND CONTROLLED FUSION 63(2021).