摘要:

We address the inverse problem of obtaining microscopic interaction potentials from macroscopic structure, here in the context of liquid-like systems. The proposed method uses a perturbation-theoretic formalism and requires noa prioriknowledge of the form of the potential. Very stable and rapidly converging potentials are obtained for widely different classes of fluids, and the results demonstrate the feasibility of inversion. The methodology can be extended to related problems in condensed matter physics and will aid in the analyses of structural data.

ISSN:0031-9104    

DOI:10.1080/00319109108030621

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

The velocity (v) of ultrasonic waves of 3 MHz frequency and density (ρ) have been measured in various binary solutions of methanol, ethanol and phenol in sulpholane at 313.15 K and used to calculate several acoustical parameters. The interaction with sulpholane has been found to be in the order of MeOH > EtOH > PhOH. In spite of the greater electron density on phenoxide ion, the ion-solvent interaction is least in phenol-sulpholane solutions; presumably due to intensive delocalization of electrons on the phenoxide ion.

ISSN:0031-9104    

DOI:10.1080/00319109108030622

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

Some anomalies have been found in the Hg-TI amalgam viscosity variation with temperature and component concentrations. An intermetallic compound formation or a miscibility gap in the amalgam state diagram are probably responsible for the anomalous behaviour. Viscosity measurements have been carried out through the toroidal oscillating viscosimeter described in Ref. 1, while previous results on Hg-TI viscosity are reported in Refs. 2,3,4. At the present time, the anomalies were mainly observed at 28.2% at. T1, which belongs to a composition interval where the amalgam behaviour is particularly complex; two intermetallic compounds are located at 28.57% and at 33.33% at. TI while their maxima in the state diagram are so flat to be hardly detectable. Anomalous results were obtained well above the solidification temperature and, though they are not evidence for a phase transition to an in-homogeneous liquid state or to an intermetallic compound, such a transition is a likely cause of the anomalous behaviour.

ISSN:0031-9104    

DOI:10.1080/00319109108030623

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

The Percus-Yevick integral equation has been solved for hard spherocylinders, using an algorithm introduced in a previous paper. The pair correlation function (PCF) and the direct correlation function have been obtained and the dependence of these functions on the elongation as well on the numerical density is presented. Some of the spherical harmonic coefficients corresponding to the PCF are also shown and compared with Monte Carlo simulations. The best agreement is obtained for intermediate elongations, corresponding to molecules such as Cl2and for the first harmonic coefficient. The variation of the PCF of selected orientations with density is similar to that of hard spheres. Nevertheless, the variation for each orientation with elongation is more complicated trending to the hard sphere limit in different ways.

ISSN:0031-9104    

DOI:10.1080/00319109108030624

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

A pseudopotential method has been considered to study the enthalpy and compressibility of liquid alkali metals (Na, K, Rb and Cs) as a function of temperature. The diameters of the hard sphere reference system were determined by minimising the Helmholtz free energy to ensure thermodynamic stability. The enthalpy, which depends weakly on temperature, has been successfully explained. The investigation suggests that the structure dependent part of energy is sufficient to explain the compressibility of liquid alkali metals near and above the melting temperatures.

ISSN:0031-9104    

DOI:10.1080/00319109108030625

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

Densities and viscosities of four binary liquid systems decanol +n-heptane, +n-octane, +n-nonane, +n-decane, have been determined at 298.15 K and atomospheric pressure, over the complete composition ranges. The excess values of molar volume, viscosity and Gibbs free energy for the activation of flow were evaluated. The Grunberg-Nissan parameter was also calculated. The viscosity data were fitted to the equations of McAllister and Auslander.

ISSN:0031-9104    

DOI:10.1080/00319109108030626

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:0031-9104    

DOI:10.1080/00319109108030620

出版商:Taylor & Francis Group    

年代:1991

数据来源: Taylor