Issues

 / 

1979

 / 

October

  

Reviews of topical problems


Thermophoresis in gases

, ,  a
a Institute of Physical Chemistry, Russian Academy of Sciences, Leninsky prosp. 31, Moscow, 119991, Russian Federation

We analyze the mechanisms that cause the motion of objects suspended in inhomogeneously heated gases. We treat two limiting cases: a) a highly rarefied gas in which the mean free path $\lambda$ of the gas molecules is large in comparison with the characteristic dimension $R$ of the object, and b) a weakly rarefied gas that satisfies the condition $\lambda\ll R$. In both cases we assume that the characteristic scale of the temperature inhomogeneities in the gas obeys $L\gg\lambda$. The case of a weakly rarefied gas is of very great interest, primarily from the standpoint of studying the state of a gas near a gas-solid phase boundary in the Knudsen layer. The greater part of the review is devoted to this problem: we treat the methodology of obtaining the boundary conditions for hydrogasdynamics with slip, and present in detail a scheme for calculating the kinetic coefficients that generalizes the Chapman--Enskog method to the case in which the state of the gas inside the Knudsen layers plays a substantial role, and we discuss the problem of the applicability of the thermodynamics of irreversible processes to problems of this type and demonstrate the efficacy of its methods. In addition, we modify the well-known method of half-range expansions on the basis of some physical assumptions and express some ideas on the principles of construction of the system of moment equations in the kinetic theory of gases. We also propose a scheme of experiment for testing the validity of the presented concepts.

PACS: 51.30.+i, 51.10.+y (all)
DOI: 10.1070/PU1979v022n10ABEH005616
URL: https://ufn.ru/en/articles/1979/10/d/
Citation: Bakanov S P, Deryagin B V, Roldugin V I "Thermophoresis in gases" Sov. Phys. Usp. 22 813–825 (1979)
BibTexBibNote ® (generic)BibNote ® (RIS)MedlineRefWorks

Оригинал: Баканов С П, Дерягин Б В, Ролдугин В И «Термофорез в газах» УФН 129 255–278 (1979); DOI: 10.3367/UFNr.0129.197910d.0255

Cited by (31) Similar articles (20) ↓

  1. V.M. Zhdanov, V.I. Roldugin “Non-equilibrium thermodynamics and kinetic theory of rarefied gases41 349–378 (1998)
  2. M.N. Kogan, V.S. Galkin, O.G. Fridlender “Stresses produced in gasses by temperature and concentration inhomogeneities. New types of free convection19 420–428 (1976)
  3. Yu.L. Klimontovich “Physics of collisionless plasma40 21–51 (1997)
  4. Yu.L. Klimontovich “Kinetic equations for nonideal gas and nonideal plasma16 512–528 (1974)
  5. B.V. Alekseev “Physical fundamentals of the generalized Boltzmann kinetic theory of ionized gases46 139–167 (2003)
  6. A.G. Khrapak, I.T. Yakubov “Electrons and positrons in dense gases22 703–726 (1979)
  7. B.M. Smirnov, G.V. Shlyapnikov “Infrared radiation transfer in molecular gases23 179–198 (1980)
  8. T.L. Andreeva, A.V. Malyugin “Fine structure of the Rayleigh spectrum of the scattering of light in molecular gases29 1097–1118 (1986)
  9. A.I. Osipov, A.V. Uvarov “Kinetic and gasdynamic processes in nonequilibrium molecular physics35 (11) 903–923 (1992)
  10. B.V. Alekseev “Physical principles of the generalized Boltzmann kinetic theory of gases43 601–629 (2000)
  11. B.F. Gordiets, A.I. Osipov et alVibrational relaxation in gases and molecular lasers15 759–785 (1973)
  12. B.M. Smirnov “Diffusion and mobility of ions in a gas10 313–331 (1967)
  13. B.M. Smirnov “Processes in expanding and condensing gases37 621–657 (1994)
  14. R.I. Soloukhin “Shock wave studies of the physical properties of gases2 547–556 (1959)
  15. N.V. Karlov, A.M. Prokhorov “Selective processes induced by resonance laser radiation at the phase boundary of two media20 721–735 (1977)
  16. A.I. Osipov, E.V. Stupochenko “Non-equilibrium energy distributions over the vibrational degrees of freedom in gases6 47–66 (1963)
  17. L.V. Leskov, F.A. Savin “On the relaxation of nonequilibrium gas systems3 912–927 (1961)
  18. D.N. Zubarev “Double-time Green functions in statistical physics3 320–345 (1960)
  19. A.G. Merzhanov, É.N. Rumanov “Nonlinear effects in macroscopic kinetics30 293–316 (1987)
  20. B.M. Smirnov “Processes involving clusters and small particles in a buffer gas54 691–721 (2011)

The list is formed automatically.

© 1918–2024 Uspekhi Fizicheskikh Nauk
Email: ufn@ufn.ru Editorial office contacts About the journal Terms and conditions