A modification of the boundary condition describing the interaction between a gas molecule and a wall is proposed for use in the calculation of internal rarefied gas flows. The effect of the altered boundary condition on a number of flows of interest is calculated. In several cases, for which experimental data are available, comparison is made between predicted and measured transport. It is found that significant improvement in the predicted transport results from the suggested boundary condition modification.
REFERENCES
1.
2.
3.
4.
5.
A. S. Berman and L. M. Lund, in Proceedings of the Second International Conference on the Peaceful Uses of Atomic Energy (United Nations, Geneva, 1958), Vol. 4, p. 359.
6.
7.
D. H.
Davis
, L. L.
Levenson
, and N.
Milleron
, J. Appl. Phys.
35
, 529
(1964
).8.
9.
W. C. DeMarcus, Union Carbide Corporation, Nuclear Division Report K‐1302, Pt. 1, (1956).
10.
W. C. DeMarcus, in Rarefied Gas Dynamics, edited by L. Talbot (Academic, New York, 1961), p. 161.
11.
Note that this probability vanishes for diffuse scattering For a finite probability of back scattering, a particle diffusely scattered at x can be back scattered an odd number of times between dy at y and x so that its next diffuse collision is again at x.
12.
W. C. DeMarcus, Union Carbide Corporation, Nuclear Division, Rept. K‐1302 Pt. 3, (1957).
13.
14.
P. F.
Bhatnagar
, E. P.
Gross
, and M.
Krook
, Phys. Rev.
94
, 511
(1954
).15.
16.
17.
18.
P.
Bassanini
, C.
Cercignani
, and F.
Sernagiotto
, Phys. Fluids
9
, 1174
(1966
).19.
20.
The authors wish to thank Professor Cercignani for kindly furnishing his FORTRAN program listing. Our calculations are generally similar to his with somewhat different integration routines and subinterval selection.
This content is only available via PDF.
© 1972 American Institute of Physics.
1972
American Institute of Physics
You do not currently have access to this content.