论文标题
振动多原子气体的ES-BGK模型
An ES-BGK model for vibrational polyatomic gases
论文作者
论文摘要
我们建议将椭圆形BGK模型扩展，以解释稀有的多原子气体中振动能的离散水平。该模型满足H Theorem并包含参数，这些参数允许拟合PrandTL数字的几乎任意值以及旋转和振动能的松弛时间。借助降低的分布技术，该模型可以简化为三个分布系统，该模型可用于模拟具有旋转和振动能量的多原子气体，计算成本接近简单的单子气体。
We propose an extension of the Ellipsoidal-Statistical BGK model to account for discrete levels of vibrational energy in a rarefied polyatomic gas. This model satisfies an H-theorem and contains parameters that allow to fit almost arbitrary values for the Prandtl number and the relaxation times of rotational and vibrational energies. With the reduced distribution technique , this model can be reduced to a three distribution system that could be used to simulate polyatomic gases with rotational and vibrational energy for a computational cost close to that of a simple monoatomic gas.
