تقرير
Crossover behavior in fluids with Coulomb interactions
| العنوان: | Crossover behavior in fluids with Coulomb interactions |
|---|---|
| المؤلفون: | Patsahan, O. V., Caillol, J. -M., Mryglod, I. M. |
| المصدر: | Eur. Phys. J. B 58, 449-459 (2007) |
| سنة النشر: | 2007 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Soft Condensed Matter, Condensed Matter - Statistical Mechanics |
| الوصف: | According to extensive experimental findings, the Ginzburg temperature $t_{G}$ for ionic fluids differs substantially from that of nonionic fluids [Schr\"oer W., Weig\"{a}rtner H. 2004 {\it Pure Appl. Chem.} {\bf 76} 19]. A theoretical investigation of this outcome is proposed here by a mean field analysis of the interplay of short and long range interactions on the value of $t_{G}$. We consider a quite general continuous charge-asymmetric model made of charged hard spheres with additional short-range interactions (without electrostatic interactions the model belongs to the same universality class as the 3D Ising model). The effective Landau-Ginzburg Hamiltonian of the full system near its gas-liquid critical point is derived from which the Ginzburg temperature is calculated as a function of the ionicity. The results obtained in this way for $t_{G}$ are in good qualitative and sufficient quantitative agreement with available experimental data. Comment: 23 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1140/epjb/e2007-00247-7 |
| الوصول الحر: | http://arxiv.org/abs/0704.0544Test |
| رقم الانضمام: | edsarx.0704.0544 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1140/epjb/e2007-00247-7 |
|---|