Sound‐wave propagation in a rarefied gas
Sound‐wave propagation in a rarefied gas
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声波在稀薄气体中的传播
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
T. C. Cheng
中科院分区：
文献类型：
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作者：
S. Loyalka;T. C. Cheng
利用线性化的BGK模型和漫反射边界条件，研究了稀薄气体中的声波传播问题。将半空间的相关积分微分方程和边界条件转换为线性积分方程组，然后通过简单的数值差分技术求解。目前的结果是在更好的协议与Meyer和Sessler和格林斯潘的实验结果比Sirovich和Thurber和Buckner和Ferziger的BGK模型的结果，分别使用解析延拓和近似边界条件。
The problem of sound wave propagation in a rarefied gas is studied by the use of the linearized BGK model and diffuse reflection boundary conditions. The relevant integrodifferental equation and boundary conditions for the half‐space are converted to a system of linear integral equations, which is then solved by a straightforward numerical differencing technique. The present results are in better agreement with the experimental results of Meyer and Sessler and Greenspan than the BGK model results of Sirovich and Thurber and Buckner and Ferziger who, respectively, use analytical continuation and an approximate boundary condition.