Consistent BGK models for inert mixtures are compared, first in their kinetic behavior and then versus the hydrodynamic limits that can be derived in different collision-dominated regimes. The comparison is carried out both analytically and numerically, for the latter using an asymptotic preserving semi-Lagrangian scheme for the BGK models. Application to the plane shock wave in a binary mixture of noble gases is also presented.
翻译:对惰性混合物采用一致的BGK模型,首先在动能行为方面进行比较,然后与不同碰撞主导制度下可得出的流体动力极限进行比较,从分析角度和数字角度进行比较,对后者则采用对BGK模型采用无症状保存半Lagrangian办法,还介绍了在惰性气体二元混合物中对平面冲击波的应用情况。