An investigation on the features of the shock structure solution of the 13-moment system of extended thermodynamics with a second-order closure based on the maximum entropy principle is presented. The results are compared to those obtained by means of the traditional first-order closure and to those obtained in the framework of kinetic theory by solving the Boltzmann equation with a BGK model for the collision term. It is seen that when adopting a second-order closure, the strength of the subshock that appears in the shock structure profile for large enough Mach numbers is remarkably reduced with respect to what is found with the first-order closure, and the overall profile of the shock structure solution is in better agreement with the results obtained with the kinetic theory approach. The analysis is extended to the case of the 14-moment system of a polyatomic gas, and some preliminary results are presented also for this case.

提出了基于最大熵原理的具有二阶闭合的扩展热力学13矩系统的激波结构解的特征研究。将结果与通过传统一阶闭包获得的结果以及在动力学理论框架下通过使用BGK模型求解碰撞项的玻尔兹曼方程获得的结果进行比较。可以看出，当采用二阶闭合时，在冲击结构轮廓中出现的，具有足够大马赫数的子冲击的强度相对于一阶闭合所发现的显着降低，并且激波结构解与动力学理论方法得到的结果更好地吻合。