Chin. Phys. Lett.  2002, Vol. 19 Issue (2): 150-152    DOI:
Original Articles |
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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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.
Keywords: 03.40.Kf      43.35.+d      47.45.-n      62.80.+f     
Published: 01 February 2002
PACS:  03.40.Kf  
  43.35.+d (Ultrasonics, quantum acoustics, and physical effects of sound)  
  47.45.-n (Rarefied gas dynamics)  
  62.80.+f (Ultrasonic relaxation)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2002/V19/I2/0150
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