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Shock structure and entropy growth in a gaseous binary mixture with viscous and thermal dissipation
Wave Motion ( IF 2.4 ) Pub Date : 2021-01-01 , DOI: 10.1016/j.wavemoti.2020.102661
Srboljub Simić , Damir Madjarević

Abstract The multi-temperature model of binary mixture, developed within the framework of extended thermodynamics, is enhanced with viscous and thermal dissipation. The shock structure problem is analyzed for the influence of dissipation on the shock thickness, influence of Mach number on the thickness and temperature in viscous profiles, and influence of the mass ratio on the profiles of state variables. The growth of entropy density is studied and compared with generalized Grad’s entropy density. A new phenomenon of entropy decrease in the upstream part of the profile is observed, caused by intensive thermal dissipation. The entropy production rate is studied and it is observed that its major part comes from thermal dissipation.

中文翻译:

具有粘性和热耗散的气态二元混合物中的激波结构和熵增长

摘要 在扩展热力学框架内开发的二元混合物多温度模型通过粘性和热耗散得到增强。分析了激波结构问题,分析了耗散对激波厚度的影响,马赫数对粘性剖面厚度和温度的影响,以及质量比对状态变量曲线的影响。研究了熵密度的增长,并与广义Grad熵密度进行了比较。在剖面的上游部分观察到一种新的熵减少现象,这是由强烈的热耗散引起的。研究了熵产生率,观察到其主要部分来自热耗散。
更新日期:2021-01-01
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