数学系"60周年"系庆系列报告
报告主题：找寻优于Grad的13矩模型
报告人：李若 教授 （北京大学）
报告时间：2020年10月26日（周一） 19:00
参会方式：腾讯 会议
会议ID：857 532 323
https://meeting.tencent.com/s/KoRnvkqhEeJA
会议密码：1026
主办部门：理学院数学系
报告摘要：We point out that the thermodynamic equilibrium is not an interior point of the hyperbolicity region of Grad's 13-moment system. With a compact expansion of the phase density, which is compacter than Grad's expansion, we derived a modified 13-moment system. The new 13-moment system admits the thermodynamic equilibrium as an interior point of its hyperbolicity region. We deduce a concise criterion to ensure the hyperbolicity, thus the hyperbolicity region can be quantitatively depicted.
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