Detail Modeling size-disperse solids and anomalous liquids Bibliografi Author: Sadr-Lahijany, S. M. Reza ; Stanley, H. Eugene (Advisor) Topik: PHYSICS; CONDENSED MATTER Bahasa: (EN )    ISBN: 0-599-11384-7     Penerbit: Boston University     Tahun Terbit: 1999     Jenis: Theses - Dissertation Fulltext: 9912994.pdf (0.0B; 0 download) Abstract In this thesis, studies are presented which concern two different subjects related to the liquid and solid phases and the phase transition between them. In the first part the focus is on the novel phenomenon of melting of an ordered solid into a disordered liquid by increasing the variance in the size distribution of its constituent particles. This subject is studied thoroughly using 2 D simulations. A novel phase diagram is proposed which includes a third “hexatic” phase and a multicritical point at the intersection of the three phases. The second part of the thesis concerns a model study of the liquid anomalies specifically observed in liquid water. The “core-softened” potential is proposed as an interaction model which reproduces three main anomalies: increases in volume and isothermal compressibility upon cooling, and a decrease in viscosity with pressure. Using the exact 1D solution of the model, 2D simulations and a 2D cell-theory approximation it is shown that the core-softened interaction exhibits all three anomalies. The anomalies are related to the existence of different local structures in the liquid arising from the shape of the interaction. This structural heterogeneity becomes more apparent upon freezing, which reveals a transition to different crystalline forms of the solid at different pressures. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Lihat Sejarah Pengadaan  Konversi Metadata   Kembali

Copyright © 2006, 2007 Unika Atma Jaya, all rights reserved