Results 271 to 280 of about 14,220,495 (297)

ON THE KINETIC THEORY OF A VAN DER WAALS GAS

Canadian Journal of Physics, 1967
A kinetic equation is proposed that leads, in equilibrium, to the Van der Waals equation of state. It is shown that this kinetic equation obeys an H theorem, and that its equilibrium solutions are, in the condensation region, of two types, (i) inhomogeneous equilibrium solutions which are absolutely stable and correspond to the two phases in ...
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The one-dimensional Van der Waals gas

Physica, 1970
Abstract The Van der Waals gas with long but finite attractive potential is studied in one dimension. The exponent of the integrand in the partition function is expanded to fourth order (“third Van der Waals approximation‘). The fourth-order term has the effect of rounding off the singularity at the Van der Waals critical point, and replacing it with
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Van der Waals-Gas

2010
Das van der Waals-Gas wird als ein Modell fur den Phasenubergang gasformig– flussig vorgestellt und untersucht. Van der Waals hat dieses Modell 1873 in seiner Doktorarbeit eingefuhrt. Die thermische Zustandsgleichung wird durch die so genannte Maxwellkonstruktion erganzt. Dann erklart das van der Waals-Modell die Existenz einer Dampfdruckkurve P d (T ),
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Nonclassical behavior of the van der Waals gas

Journal of Statistical Physics, 1973
The partition function of the van der Waals gas is represented by a functional integral which is evaluated by summing the value of the integrand over its absolute and all of its secondary maxima. This leads to a one-to-one correspondence with the Ising model with nearest-neighbor interactions only.
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Acoustic Relaxation in a van der Waals Gas

The Journal of the Acoustical Society of America, 1952
Expressions are given for the sound velocity and the absorption coefficient per unit wavelength for a van der Waals gas. Numerical calculations have been carried out for several triatomic gases. In general, the velocity corrections, under standard conditions, average about 0.5 percent, while the absorption corrections are two or three times larger.
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Crystallization via shaking in a granular gas with van der Waals interactions

Physical Review E, 2019
We investigate the effect of van der Waals forces on a collection of granular particles by means of molecular dynamics simulations of a vibrated system in three dimensions. The van der Waals interactions introduce two phase coexistences: one between a random close packing and a gas and a second between a polycrystalline dense state and a gas, where the
Qiong Bai, Marco G. Mazza
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New combining rules for rare gas van der waals parameters

Journal of Computational Chemistry, 1993
AbstractNew combining rules are proposed for the well depth, ϵ, and interaction distance, σ, describing nonbonded interatomic forces for rare gas pair interactions. Concepts underlying current combining rules applied in simulations of macromolecular and polymer systems are shown to be incompatible with experimental data on the rare gases.
Marvin Waldman, Arnold T. Hagler
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Exact Roe Linearization for van der Waals’ Gas

2001
An extension of Roe’s method to the van der Waals gas is presented. The introduction of a convenient supplementary equation in the Roe linearization problem for the intermediate state allows to evaluate the velocity and total specific enthalpy separately from the determination of the density that is needed to compute the Roe matrix when thermodynamic ...
A. Guardone, L. Quartapelle
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Van der Waals gas model for potassium in tungsten

International Journal of Refractory Metals and Hard Materials, 1998
Abstract Current theories involve the assumption of homogeneous bubble phase when describing the development of potassium bubble structure in K Al Si doped tungsten during thermomechanical processing. However, it follows from first principles that at process temperatures bubbles can exist in a two-phase state.
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Propagation of weak waves in a dusty, van der Waals gas

Meccanica, 2015
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Chadha, Meera, Jena, J.
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