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Teoreticheskaya i Matematicheskaya Fizika, 1975, Volume 24, Number 3, Pages 368–381
(Mi tmf4021)
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Noncumulant projection and elimination of time derivatives from the nonequilibrium distribution function
L. Ts. Adzhemyan, F. M. Kuni
Abstract:
Time-independent projection operators are introduced, the action of which on the
non-equilibrium distribution function leads to quasi-equilibrium function. These projection
operators single out in a consequtive way the contributions from unconnected
diagrams and so they may be called non-cumulant. By means of the non-cumulant projections
the time derivatives are removed from the non-equilibrium distribution function.
This is performed for the most general case of hydrpdynamic theory, i.e. in any
order with respect to the amplitude deviations from the equilibrium and with the spatial
and time dispersion completely taken into account. The final expression for the nonequilibrium
distribution function contains explicitly the contributions of connected
diagrams only. With the aid of the technique developed, the equations of the nonlinear
and non-local in time and space hydrodynamics obtained earlier on the basis of the Mori
projection operators, are transformed to the explicitly connected form. Then the equivalence
between these equations and the equations obtained on the basis of the non-cumulant
projection operators is established.
Received: 03.10.1974
Citation:
L. Ts. Adzhemyan, F. M. Kuni, “Noncumulant projection and elimination of time derivatives from the nonequilibrium distribution function”, TMF, 24:3 (1975), 368–381; Theoret. and Math. Phys., 24:3 (1975), 895–904
Linking options:
https://www.mathnet.ru/eng/tmf4021 https://www.mathnet.ru/eng/tmf/v24/i3/p368
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Abstract page: | 347 | Full-text PDF : | 105 | References: | 45 | First page: | 1 |
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