Abstract
The isotropic Boltzmann equation is solved using the Sonin moment system of equations. The main task here is the construction of a matrix describing the particle interaction. Such a matrix has been constructed analytically for various interaction cross sections in a number of papers [M. Barnsley and G. Turchetti, Lett. Nuovo Cimento 33, 347 (1982); G. Turchetti and M. Paolilli, Phys. Lett. A 90, 123 (1982); F. Schürrer and G. Kügerl, Phys. Fluids A 2, 609 (1990); A. Ya. Énder and I. A. Énder, Tech. Phys. 39, 997 (1994)]. Calculations of matrix elements arrived at by different methods for the hard-sphere model are compared. Some general properties of the matrix are found that can be used as criteria of the validity of the calculations. With the help of such criteria it is shown that the nonlinear matrix elements were calculated incorrectly by Schürrer and Kügerl (op. cit.).
Similar content being viewed by others
References
M. Barnsley and G. Turchetti, Lett. Nuovo Cimento 33, 347 (1982).
G. Turchetti and M. Paolilli, Phys. Lett. A 90, 123 (1982).
F. Schürrer and G. Kügerl, Phys. Fluids A 2, 609 (1990).
A. Ya. Énder and I. A. Énder, Zh. Tekh. Fiz. 64, 38 (1994) [Tech. Phys. 39, 997 (1994)].
I. A. Énder and A. Ya. Énder, Dokl. Akad. Nauk SSSR 193, 61 (1970) [Sov. Phys. Dokl. 15, 1 (1970)].
I. N. Kolyshkin, A. Ya. Énder and I. A. Énder, Zh. Vychisl. Mat. Mat. Fiz. 28, No. 6, 901 (1988).
C. A. Word and D. Mintzer, Phys. Fluids 14, 499 (1971).
M. H. Ernst, Phys. Rep. 78, 1 (1981).
I. A. Énder and A. Ya. Énder, Zh. Tekh. Fiz. 54, 1671 (1984) [Tech. Phys. 29, 978 (1984)].
I. N. Kolyshkin, A. Ya. Énder, and I. A. Énder, Izv. Akad. Nauk SSSR, Mekh. Zhidk. Gaza No. 5, 132 (1977).
E. M. Deshpande and R. Narasimha, J. Fluid Mech. 36, 3 (1969).
Author information
Authors and Affiliations
Additional information
Zh. Tekh. Fiz. 68, 18–26 (May 1998)
Rights and permissions
About this article
Cite this article
Énder, A.Y., Énder, I.A. Relaxation of a hard-sphere gas and criteria of validity of the calculations. Tech. Phys. 43, 493–501 (1998). https://doi.org/10.1134/1.1259027
Received:
Issue Date:
DOI: https://doi.org/10.1134/1.1259027