Numerical analysis of the dynamic motion of a bubble rising through shear-thinning viscoelastic fluids

一种将careau模型与FENE模型相结合的新型混合模型的数值方法。建立了处理非牛顿气液流动弹性特性的CR模型。用所建立的方法计算了剪切减薄粘弹性流体中气泡或液滴的上升运动和剪切减薄粘弹性剪切流中液滴的变形和破碎。数值结果表明，弹性减薄和剪切减薄对气泡或水滴运动具有协同作用。

A numerical method with a new hybrid model which combines the Carreau model for treating shear-thinning properties with the FENE.CR model for treating elastic properties was established for computing non-Newtonian gas-liquid flows. The motion of a bubble or drop rising in shear-thinning viscoelastic fluids and drop deformation and breakup in shear-thinning viscoelastic shear flows were computed using the established method. Numerical results revealed that both elastic and shear-thinning properties had synergistic effects on the bubble or drop motion.