Estudo das correlações em líquidos clássicos / Study of the correlations in classical liquids
AUTOR(ES)
José Pedro Rino
DATA DE PUBLICAÇÃO
1983
RESUMO
We have studied in this work three different classic fluid systems. The first one, formed by polystyrene spheres adsorbed on water, can be described by a dipolar (1/r3) interaction. Theradial correlation function and static structure factor as well the correlation energy and Helmholtz free energy were obtained in the framework of the Hypernetted Chain (HNC) Integral Approximation. Our results were in excell entagreement with the "exact" results from Molecular Dynamics techniques. The second system consists of electrons trapped on the liquid helium films wetting a solid substrate . In this case, we have generalized the works of Studart and Hipolito, and Monarkha, by analysing the influence of the film thickness and different kinds of substrates. By using the Self-Consistent Field Approximation (SCFA), we have evaluated the static structure factor, correlation energy and plasma dispersion relation . The local field correction, responsible by the short-range correlation , modifies drastically the results from the Random-Phase Approximation (RPA). In the third system, a charged hard sphere fluid , we have determined, by using SCFA, some properties of this many-body system such as the static structure factor, pair correlation function, the equation of state and correlation energy. For the first time , we have calculated the plasma dispersion relation of this generalized one-component plasma. This system is very interesting because, in a first approximation, it can describe eletrolytes and molten salts.
ASSUNTO(S)
correlação estrutural structural correlations classical liquids líquidos clássicos
