By D. Weaver Phillips, B. Shizgal
One in all 3 volumes that include revised types of technical papers awarded on the July 1992 symposium. the current quantity comprises forty eight papers in 5 chapters: satellite tv for pc aerodynamis; rarefied aerodynamic flows; hypersonic rarefied flows; plasma physics; and shipping phenomena and techniques. No
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Sample text
E. Beylich, (VCH Verlagsgesellschaft mbH, Weinheim), 1991, pp. 745-752. , "Generalized scheme of no-time-counter scheme for DSMC in rarefied gas flow analysis," Computers &Fluids, Vol. 22 ,1993, pp. 253-257. 7 Abe, T. "Anomalous collision rate in direct simulation Monte Carlo method," Second Japan-Soviet unit Joint Symposium on Compu. Fluid Dynamics, Tsukuba, 1990, p. 298-305. , "Statistical Collision Model for Monte Carlo Simulation of Polyatomic Gas Mixture," Journal of Computational Physics, Vol.
Hence, to understand the discrepancy between the theoretical prediction and the measured data, we must consider the conditions neglected in the above prediction. One factor we must consider is the chemical energy of the atomic oxygen, which is one of the main components of the air at a 120-km altitude. 0 10 20 30 a (deg) Fig. 9 Drag and normal f o r c e c o e f f i c i e n t s at the altitude of 120 km. atomic oxygen is possibly released at the surface of heat flux meter, if the recombination reaction of the atomic oxygen takes place owing to the catalytic effect of the surface of the heat flux meter.
04 12:20 12:40 13:00 13:20 13:40 [UTJ Fig. 3 Satellite attitude in normal control mode. aerodynamic effect is around 10~5 Nm whereas the one generated by the gravity gradient effect is one order smaller. The torque generated by the solar pressure is negligible, although the solar pressure is on the same order as the aerodynamic pressure. This is because the attitude of the satellite is at a right angle to the sun, and the torque generated by the solar pressure is canceled. Although the gravity gradient effect can not be neglected, it fortunately can be precisely simulated.