Modified Fokker-Planck equations
作者:
GlennT. Evans,
期刊:
Molecular Physics
(Taylor Available online 1978)
卷期:
Volume 36,
issue 1
页码: 65-78
ISSN:0026-8976
年代: 1978
DOI:10.1080/00268977800101401
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
A rotational FP-like equation is derived for the motion of a tagged diatomic molecule in a bath of diatomics possessing rotational and translational degrees of freedom. The torque correlation operator in the FP-like equation has contributions from (1) rotation-translation coupling; (2) collisions which change the orientation of the molecule as well as its momentum; and (3) non-linear momentum relaxation. An approximate improved FP collision operator is suggested and is employed in the calculation of the orientational distribution function and correlation time,τl, for a high density fluid in the strong collision regime. A translational FP equation for non-spherical molecules is also obtained by analogy with the rotational case.
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