In this article we generalize to polyatomic gases the moment closure of the relativistic Anderson–Witting model proposed by Cercignani and Kremer in the monatomic case, that uses the four-velocity in the Landau–Lifshitz description. A moment model is derived and compared with that recently proposed by Pennisi and Ruggeri using a variant of the Anderson–Witting model in an Eckart frame, obtaining that the balance equations and the collision term are equivalent up to first order with respect to equilibrium.

中文翻译：

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Landau 和 Lifshitz 描述中多原子气体的相对论扩展热力学

在本文中，我们将 Cercignani 和 Kremer 在单原子情况下提出的相对论 Anderson-Witting 模型的矩闭包推广到多原子气体，该模型使用 Landau-Lifshitz 描述中的四速度。推导出一个矩模型，并与 Pennisi 和 Ruggeri 最近在 Eckart 框架中使用 Anderson-Witting 模型的变体提出的模型进行比较，获得平衡方程和碰撞项在平衡方面的一阶等效。