Novel perturbation approach for the structure factor of the attractive hard-core Yukawa fluid

Melnyk, Roman; Mouka, Filip; Nezbeda, Ivo; Trokhymchuk, Andrij
September 2007
Journal of Chemical Physics;9/7/2007, Vol. 127 Issue 9, p094510
Academic Journal
A novel perturbation approach for the structure factor S(k) of the Lennard-Jones-type Yukawa fluid with z=1.8 is presented. An approach is based on a new reference system, that is, the short-range Yukawa model with z0>z=1.8. By choosing for the reference system the value z0=6, it is shown that (i) the proposed approach for S(k) performs much better than the traditional hard-sphere reference perturbation method does; (ii) the use of an approximate mean spherical (MSA) description of the reference structure factor provides the results for S(k) that are more accurate as those obtained from the direct MSA computations; and (iii) the results obtained for S(k) tend to reproduce “exact” simulation results when accurate simulation data for the reference system are used.


Related Articles

  • Ab initio dynamic multipole polarizabilities and hyperpolarizabilities of H2O and the long-range.... Spelsberg, Dirk; Meyer, Wilfried // Journal of Chemical Physics;1/22/1998, Vol. 108 Issue 4, p1532 

    Examines the ab initio dynamic multipole polarizabilities and hyperpolarizabilities of water. Analysis on the long-range interaction coefficients for the dimer of water; Determination of the perturbed states representing the response to an external electric field; Representation of the...

  • The Convective Cold Top and Quasi Equilibrium. Holloway, Christopher E.; Neelin, J. David // Journal of the Atmospheric Sciences;May2007, Vol. 64 Issue 5, p1467 

    To investigate dominant vertical structures of observed temperature perturbations, and to test the temperature implications of the convective quasi-equilibrium hypothesis, the relationship of the tropical temperature profile to the average free-tropospheric temperature is examined in Atmospheric...

  • Perturbation expansion and weakly nonlinear analysis for two-dimensional vortices in curved or rotating channels. Finlay, W. H. // Physics of Fluids A;May89, Vol. 1 Issue 5, p854 

    Spectral simulation is used to test the perturbation expansion of Davey [J. Fluid Mech. 14, 336 (1962)] applied to two-dimensional, streamwise-oriented vortices in curved channel flow and rotating channel flow over a wide range of parameters. The power series dependence on Reynolds number...

  • Effect of Allowance for Small‐Scale Perturbations of the Carrier Phase on Properties of the System of Equations of a Two‐Fluid Flow with Incompressible Phases. Kantsyrev, B. L. // Journal of Applied Mechanics & Technical Physics;Jan/Feb2004, Vol. 45 Issue 1, p31 

    The effect of the fluctuating components of kinetic energy and stress tensor of the carrier phase, which were previously obtained by the cell technique, on the properties of the system of equations of a gas–liquid flow with incompressible phases is considered. It is shown that the...

  • The evolution of Kirchhoff elliptic vortices. Mitchell, T. B.; Rossi, L. F. // Physics of Fluids;May2008, Vol. 20 Issue 5, p054103 

    A Kirchhoff elliptic vortex is a two-dimensional elliptical region of uniform vorticity embedded in an inviscid, incompressible, and irrotational fluid. By using analytic theory and contour dynamics simulations, we describe the evolution of perturbed Kirchhoff vortices by decomposing solutions...

  • Thermodynamics and elastic moduli of fluids with steeply repulsive potentials. Heyes, D. M. // Journal of Chemical Physics;8/8/1997, Vol. 107 Issue 6, p1963 

    Analytic expressions for the thermodynamic properties and elastic moduli of molecular fluids interacting with steeply repulsive potentials are derived using Rowlinson’s hard-sphere perturbation treatment which employs a softness parameter, λ specifying the deviation from the...

  • Perturbations of the EM-field Meters Reading Caused by Flat Roof Security Wall. Bahillo, Alfonso; Blas, Juan; Mazuelas, Santiago; Fernanadez, Patricia; Lorenzo, Ruben Mateo; Abril, Evaristo Jose // International Journal of Signal Processing;2008, Vol. 4 Issue 4, p285 

    The wide increase and diffusion on telecommunication technologies have caused a huge spread of electromagnetic sources in most European Countries. Since the public is continuously being exposed to electromagnetic radiation the possible health effects have become the focus of population concerns....

  • Stability margins of the systems of optimal and modal control. Aleksandrov, A. // Automation & Remote Control;Aug2007, Vol. 68 Issue 8, p1296 

    Consideration was given to the systems of H ∞-suboptimal and modal control and the causes of their small phase and magnitude margins.

  • Robust Control Design for Mechanisms with Backlash. Acho, Leonardo; Ikhouanel, Fayçal; Pujo, Gisela // Journal of Control Engineering & Technology;Oct2013, Vol. 3 Issue 4, p175 

    A robust feedback control is designed for mechanisms with backlash, where regulation problem is solved under the presence of external perturbation. Appealing the static dead-zone model as a model for backlash, the nonlinear problem is posted in linear H ∞framework. Experimental realization...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics