Collective dynamics in single-particle motion for pure fluids
Single-particle time correlation function Fs(k,t) of pure fluids is studied within the generalized mode approach. Analytical expression for self-intermediate scattering function, which contains oscillating terms, is obtained for three-variable basis set of single-particle dynamic variables. The m...
Збережено в:
| Дата: | 2003 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут фізики конденсованих систем НАН України
2003
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| Назва видання: | Condensed Matter Physics |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/120694 |
| Теги: |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Collective dynamics in single-particle motion for pure fluids / T.M. Bryk, I.M. Mryglod, A.D. Trokhymchuk // Condensed Matter Physics. — 2003. — Т. 6, № 1(33). — С. 23-42. — Бібліогр.: 23 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | Single-particle time correlation function Fs(k,t) of pure fluids is studied
within the generalized mode approach. Analytical expression for self-intermediate
scattering function, which contains oscillating terms, is obtained
for three-variable basis set of single-particle dynamic variables. The meaning
of oscillating contributions is discussed, and it is shown, that in lowdensity
fluids the oscillating contributions do not appear. Our approach,
developed within the five-variable scheme, is used for the analysis of MDderived
single-particle time correlation function of Lennard-Jones fluid at
two densities. It is shown, that the proposed scheme allows us to reproduce
perfectly the function Fs(k,t) at the whole range of wavenumbers k
studied. The generalized self-diffusion coefficient as a function of k is also
calculated. |
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