Abstract
The flow field is computed around a 1 cm diameter Leonid meteoroid as it enters the Earth’s atmosphere at an altitude of 95 km and a velocity of 72 km/s. These conditions correspond to a Knudsen number of 4 and a Mach number of 270. To accurately compute the gas flow, these extreme nonequilibrium conditions require application of a kinetic approach and the present work employs the direct simulation Monte Carlo method. A meteoroid ablation model is included in the computations and is found to play a significant role. The computational results predict that a large region of the flow field is affected by meteoroid ablation that produces an extended wake at high temperature in a state of thermal equilibrium. These findings are in qualitative agreement with spectroscopic observations of the 1998 Leonid meteoroid shower. The computations indicate that the results are sensitive to the material properties assumed for the meteoroid.
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References
BabacUanov, P. B. and Kramer, E. N.: 1968, in L. Kresak and P.M. Millman (eds.), Physics and Dynamics of Meteors,p. 128–142.
Bird, G. A.: 1994, Molecular Gas Dynamics and the Direct Simulation of Gas Flows,Oxford University Press, 458 pp.
Boyd, I. D., Phillips, W.D., and Levin D.A.: 1998, Journal of Thermophysics and Heat Duns/. er 12, 38–44.
Bronshten, V. A.: 1983, Physics of Meteoric Phenomena,D. Reidel Publ. Co., Dordrecht, 356 pp..
Ceplecha, Z., BoroviCka,, J., Elford, W.G., ReVelle, D.O., Hawkes, R.L., Porubcan, V., and Simek, M.: 1998, Space Science Reviews 84, 327–471.
Dietrich, S. and Boyd, I.D.: 1996, Journal of Computational Physics 126, 328–342. Jaroscewich, E.: 1990, Meteoritics 25, 323–337.
Jenniskens, P. and Butow, S.J.: 1999, Meteoritics Planet. Sci. 34, 933–943.
Jeimiskens, P., Packan, D., Laux, C., Wilson, M., Boyd, I.D., Popova, O., Krueger, C.H., and Fonda, M.: 2000, Earth, Moon and Planets 82–83, 57–70.
Jessberger, E. K., Christoforidis, A., and Kissel, J.: 1988, Nature 332, 691–695.
Rault, D.F.G.: 1994, Journal of Spacecraft and Rockets 31, 944–952.
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© 2000 Springer Science+Business Media Dordrecht
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Boyd, I.D. (2000). Computation of Atmospheric Entry Flow about a Leonid Meteoroid. In: Jenniskens, P., Rietmeijer, F., Brosch, N., Fonda, M. (eds) Leonid Storm Research. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-2071-7_8
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DOI: https://doi.org/10.1007/978-94-017-2071-7_8
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5624-5
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