黏弹流体在串联收缩-扩张毛管束中流动的有效黏度

Effective viscosity of viscoelastic fluid through series connected bundle of con verging diverging capillary

将多孔介质视为串联的收缩 -扩张毛管束模型 ,针对黏弹流体在这种模型中的剪切和拉伸流动 ,在流动总压降等于剪切压降和拉伸压降之和的假设下 ,用微元分析方法 ,建立了黏弹流体在串联的收缩 -扩张毛管束模型中的有效黏度公式 ;根据HPAM水溶液在人造岩心中流动的实验数据 ,计算了HPAM水溶液在人造岩心中的有效黏度 .结果表明

The porous media is regarded as series connected bundle of convergingdiverging capillary in this paper. The pressure drop of shear flow and pressure drop of extensional flow are added to give the total pressure drop. The shear fl ow and extensional flow are studid with microelement analysis method. The effect viscosity formula of viscoelatic fluid is derived in this model. According to t he flow experiment data of HPAM solution in the porous medium, the effect viscos ity is computed. The result shows that the effect viscosity formula could show e lastic viscosity due to extensional flow and shear viscosity due to shear flow i n porous media.