On the Distribution of Heat in Fibered Magnetic Fields
On the Distribution of Heat in Fibered Magnetic Fields
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关于纤维磁场中的热量分布
DOI:
10.1007/s00220-023-04886-4
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发表时间:
2024
影响因子:
2.4
通讯作者:
Grayer, Hezekiah
中科院分区:
文献类型:
--
作者:
Drivas, Theodore D.;Ginsberg, Daniel;Grayer, Hezekiah
We study the equilibrium temperature distribution in a model for strongly magnetized plasmas in dimensions two and three. Provided the magnetic field is sufficiently structured (integrable in the sense that it is fibered by co-dimension one invariant tori, on most of which the field lines ergodically wander) and the effective thermal diffusivity transverse to the tori is small, it is proved that the temperature distribution is well approximated by a function that only varies across the invariant surfaces. The same result holds for “nearly integrable” magnetic fields up to a “critical” size. In this case, a volume of non-integrability is defined in terms of the temperature defect distribution and is related to the non-integrable structure of the magnetic field, confirming a physical conjecture of Paul et al (J Plasma Phys 88(1):905880107, 2022). Our proof crucially uses a certain quantitative ergodicity condition for the magnetic field lines on a full measure set of invariant tori, which is automatic in two dimensions for magnetic fields without null points and, in higher dimensions, is guaranteed by a Diophantine condition on the rotational transform of the magnetic field.
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影响因子:
2.5
作者:
P. Helander;S. Hudson;E. Paul
通讯作者:
E. Paul
DOI:
--
发表时间:
1957
期刊:
影响因子:
--
作者:
S. Sternberg
通讯作者:
S. Sternberg
影响因子:
8.6
作者:
S. Hudson;J. Breslau
通讯作者:
J. Breslau
DOI:
--
发表时间:
1985
期刊:
影响因子:
--
作者:
H. Grad
通讯作者:
H. Grad
影响因子:
1.7
作者:
Constantin, Peter;Drivas, Theodore D;Ginsberg, Daniel
通讯作者:
Ginsberg, Daniel