ISSN:
1573-8620
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract In the article a calculation is made of the transport properties of air in the region of temperatures from 3000 to 25,000 °K and pressures of 0.1, 1, 10, and 100 atm. The calculations are made within the framework of molecular-kinetic theory in a first approximation of the distribution function by the Chapman-Enskog method, taking account of the first four terms of a series expansion by Sonin polynomials. The collision integrals Ω ij l,s of the air components (N2-N2, O2-O2, NO-NO, N2-O2, N2-NO, O2-NO, N2-N, N2-O, O2-N, O2-O, N-NO, O-NO, N-N, O-O, O-N, e-N, e-O, e-N2, e-O2, e-NO, N-N+, O-O+, N-O+, O-N+, electron-ion, ion-ion, electron-electron) of the ordersl=1, 4 and s=l, (8-l) are calculated. As far as possible the collision integrals presented are calculated on the basis of experimentally measured interaction potentials obtained through the “direct” scattering of atomic and molecular beams on gas targets or other beams. The missing information on interaction potentials is borrowed from works on spectroscopic analysis. The scattering of an electron on an oxygen atom is calculated in the framework of a quantum-mechanical analysis. The collision integrals presented for charged components of the air were calculated numerically for the Debye-Hückel screening potential. The collision integral moments obtained in the work can be used to calculate the kinetic coefficients for an arbitrary mixture of nitrogen and oxygen, including the case of a variable elementary composition.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01200657
