The visualization of collision process of diatomic molecules

The collison of N2 molecules in which only rotation of molecules is regarded as internal degree of freedom is simulated and the energy transfer between translational and rotational energy is investigated numerically at low temperature. The results are visualized and it is shown that energy transfer changes by the direction and orientation of rotational vector and the impact parameter and it is also distributed in some form according to the initial translational and rotational energy. Using these results, the collision model of diatomic molecule is constructed and is applied to the Direct Simulation Monte Carlo Method and some properties of fluids , for instance, the energy distribution at equiliblium condition and so on, are calculated for making sure of its validity. It is shown that the collision process of diatomic molecules can be calculated well by use of this model.