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Spectral Problems for the Orientation-Free Discrete Kinetic Models |
| CHU R. Kwang-Hua1,2;JIN Yan-Fang1;FANG Jing1 |
| 1Department of Mechanics and Engineering Science, Peking University, Beijing 100871
2Department of Physics, Northwest Normal University, Lanzhou 730070
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| Cite this article: |
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CHU R. Kwang-Hua, JIN Yan-Fang, FANG Jing 2002 Chin. Phys. Lett. 19 150-152 |
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Abstract We present computations using orientation-free discrete velocity models for the dispersion relationship of ultrasound propagation in monatomic hard-sphere gases (or a type of gas composed of system of vortices). Comparisons with previous verified fixed-orientation results for the propagation of the sound mode in rarefied gases show that, if collective excitations are considered, an orientation-free eight-velocity model can capture more physical insights. We also demonstrate the symmetry property of the Spectra using the orientation-free eight-velocity model.
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| Keywords:
03.40.Kf
43.35.+d
47.45.-n
62.80.+f
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Published: 01 February 2002
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