Thermal and tangential momentum accommodation coefficients have been obtained for N2 colliding with various surfaces of relevance to the disk-drive air bearing using molecular beam scattering techniques. Analysis of the velocity and angular distributions of scattered species indicates that N2 is essentially fully accommodated at the relevant surfaces for energies characteristic of room temperature gas.

1.
Alexander
F. J.
,
Garcia
A. L.
, and
Alder
B. J.
,
1994
, “
Direct Simulation Monte Carlo for Thin Film Bearings
,”
Phys. Fluids (USA)
, Vol.
6
, pp.
3854
3860
.
2.
Barker
J. A.
, and
Auerbach
D. J.
,
1984
, “
Gas-Surface Interactions and Dynamics: Thermal Energy Atomic and Molecular Beam Studies
,”
Surf. Sci. Reports
, Vol.
4
, pp.
1
99
.
3.
Burgdorfer
A.
,
1959
, “
The Influence of the Molecular Mean Free Path on the Performance of Hydrodynamic Gas Lubricated Bearings
,”
ASME Journal of Basic Engineering
, Vol.
81
, pp.
94
100
.
4.
Comsa
G.
,
Fremerey
J. K.
,
Lindenau
B.
,
Messer
O.
, and
Ro¨hl
P.
,
1980
, “
Calibration of a Spinning Rotor Gas Friction Gauge against a Fundamental Vacuum Pressure Standard
,”
J. Vac. Sci. Technol.
, Vol.
17
, pp.
642
644
.
5.
Fukui
S.
, and
Kaneko
R.
,
1988
, “
Analysis of Ultra-Thin Gas Film Lubrication Based on Linearized Boltzmann Equation: First Report-Derivation of a Generalized Lubrication Equation Including Thermal Creep Flow
,”
ASME JOURNAL OF TRIBOLOGY
, Vol.
110
, pp.
253
262
.
6.
Rettner
C. T.
,
DeLouise
L. A.
, and
Auerbach
D. J.
,
1986
, “
Effect of Incidence Energy and Coverage on the Dissociative Chemisorption Of Oxygen On W(110)
,”
J. Chem. Phys.
, Vol.
85
, pp.
1131
1149
.
7.
Rettner
C. T.
,
Schweizer
E. K.
, and
Mullins
C. B.
,
1989
, “
Desorption and Trapping of Ar at a 2H-W(100) Surface and a Test of the Applicability of Detailed Balance to a Non-Equilibrium System
,”
J. Chem. Phys.
, Vol.
90
, pp.
3800
3813
.
8.
Saxena, S. C., and Joshi, R. K., 1981, Thermal Accommodation and Adsorption Coefficients of Gases, Touloukian, Y. S., and Ho, C. Y., eds., McGraw-Hill, New York.
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