| Автор | Soon-Chul Kim |
| Дата выпуска | 1992-11-30 |
| dc.description | The author reformulates the weighted-density approximation based on a global average of the density by using the unified density-functional approach for non-uniform classical fluids which was introduced by Zeng and Oxtoby (1990). He shows that the modified weighted-density approximation (MWDA) of Denton and Ashcroft (1991) and the weighted-density approximation of Zeng and Oxtoby can be approximated as second-order truncations of exact functional expansions. Through this reformulation, a new version of the modified weighted-density approximation is proposed (NMWDA) depending on the charging parameter is proposed and a basic question arising from the density-functional expansions is briefly discussed. It is shown that for homogeneous systems the NMWDA and the weighted-density approximation including the higher-order contributions also lead to the usual hypernetted-chain equation of state, and the homogeneous properties of the weighted-density approximation do not depend on the detailed forms of n-particle hierarchy functions. Finally, the author applies the NMWDA to the liquid-solid transition. The numerical results obtained are compared with those of computer simulations and other approximations and show good agreement with computer simulations. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Weighted-density approximations for non-uniform classical fluids and their applications |
| Тип | paper |
| DOI | 10.1088/0953-8984/4/48/007 |
| Electronic ISSN | 1361-648X |
| Print ISSN | 0953-8984 |
| Журнал | Journal of Physics: Condensed Matter |
| Том | 4 |
| Первая страница | 9517 |
| Последняя страница | 9524 |
| Аффилиация | Soon-Chul Kim; Dept. of Phys., Andong Nat. Univ., South Korea |
| Выпуск | 48 |
