格子气的声振荡衰减  

Attenuation of sound oscillation in lattice gas

作　　者：陈宇[1] 丁元国[1] 刘旭[1] 沈建国[1] 

机构地区：[1]清华大学物理系,北京100084

出　　处：《大学物理》2003年第6期7-9,共3页College Physics

基　　金：.NULL.

摘　　要：采用格子气数值方法模拟了共振腔中气体声振荡衰减过程 .计算结果表明 :格子气中声振荡衰减的规律和经典理论结果一致 ;衰减系数随频率增加而减小 ,并且随密度增加而减小 .该结果可以用来说明一些大学统计物理教科书中的一个经典例子存在不完善之处 .本文中采用了一种新的扭转 9-bit格子气模型和并行计算方法 ,这些结果对今后研究格子气中的热声问题有参考价值 .A lattice gas method is applied to simulate the attenuation of sound oscillation. Calculation results shows that sound attenuation in lattice gas agrees with the classical result. The attenuation coefficient decreases with increasing of frequency and the gas density. The simulation result can be used to illustrate the equilibrium process in undergraduate statistic physics. A rotated 9 bit lattice gas model and a parallel computation method are used. The results of this paper are valuable in further study of thermoacoustic problems.

关 键 词：格子气 声振荡衰减 

分 类 号：O411.3[理学—理论物理] O414.2[理学—物理]