The toroidal momentum diffusivity in a tokamak plasma: A comparison of fluid and kinetic calculations

Strintzi, D; Peeters, AG; Weiland, J

dc.contributor.author	Strintzi, D	en
dc.contributor.author	Peeters, AG	en
dc.contributor.author	Weiland, J	en
dc.date.accessioned	2014-03-01T01:29:20Z
dc.date.available	2014-03-01T01:29:20Z
dc.date.issued	2008	en
dc.identifier.issn	1070-664X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19233
dc.subject.classification	Physics, Fluids & Plasmas	en
dc.subject.other	Fluid mechanics	en
dc.subject.other	High energy physics	en
dc.subject.other	Momentum	en
dc.subject.other	Prandtl number	en
dc.subject.other	Thermal gradients	en
dc.subject.other	Viscosity	en
dc.subject.other	Drift term	en
dc.subject.other	Four-moment gyrofluid	en
dc.subject.other	Gyroviscosity	en
dc.subject.other	Kinetic electrons	en
dc.subject.other	Tokamak devices	en
dc.title	The toroidal momentum diffusivity in a tokamak plasma: A comparison of fluid and kinetic calculations	en
heal.type	journalArticle	en
heal.identifier.primary	10.1063/1.2907370	en
heal.identifier.secondary	http://dx.doi.org/10.1063/1.2907370	en
heal.identifier.secondary	044502	en
heal.language	English	en
heal.publicationDate	2008	en
heal.abstract	Fluid and gyrokinetic calculations of the toroidal momentum diffusivity in a tokamak are compared. The four-moment gyrofluid model predicts the Prandtl number connected with the ion temperature gradient mode reasonably well provided the drift term is kept in the momentum balance. Without the drift term in the momentum balance, some previous gyrofluid models predicted small values of the Prandtl number in the range of experimental observations. It is shown that the drift term enters in the fluid equations through the gyroviscosity. Gyrokinetic calculations of the ion temperature gradient mode with kinetic electrons, and for experimentally relevant parameters yield a Prandtl number in the range 0.7-1.2. (C) 2008 American Institute of Physics.	en
heal.publisher	AMER INST PHYSICS	en
heal.journalName	Physics of Plasmas	en
dc.identifier.doi	10.1063/1.2907370	en
dc.identifier.isi	ISI:000255456700059	en
dc.identifier.volume	15	en
dc.identifier.issue	4	en