气泡在液体中运动过程的数值模拟

本文用数值方法预测气泡在液体中的百定常运动。运用位标函数进行界面的隐含跟踪并且与有限体积法相结合构成一种可行的计算方法。本文方法允许在界面处存在很大的物性差，而且较容易将表面张力引入控制方程。我们对气液两相流中单个气泡的运动进行了计算，得到了与实验结果符合很好的数值结果。

Numerical simulation of coupled creep elastoplastic damage constitutive model at large strain

A numerical model to simulate isotropic, coupled creep elastoplastic damage constitutive behavior at finite strain is proposed in the present work. The model is developed on the basis of thermodynamics of an irreversible process and the internal state variable theory. A hyperelastic form of stress strain constitutive relation in conjunction with the multiplicative decomposition of the deformation gradient into elastic and inelastic parts is utilized. A consistent integration algorithm to update stresses and the internal state variables is derived. A consistent tangent matrix with consideration of the fully coupled effects at finite strain is formulated.