摘要
提出了描述粘弹性流体流变特性的修正上随体MaxweⅡ本构方程,利用数值计算方法模拟了该流体在扩张流道中的流动特征,给出了流场图和速度场图,并分析了修正上随体MaxweⅡ流体的非牛顿幂律特性及粘弹性对流场的影响。研究表明,在扩张流道中,随着幂律指数的逐渐增大,速度等值线逐渐向凹角内伸展,流动区域增大;随着粘弹性的增强,流体的波及体积增加,波及效率增大。
This paper proposes the upper- convected Maxwell equation for describing the rheological property of viscoelastic fluid. The flow characteristics in expansionary channel are described by numerical method. The stream isoline and velocity isoline are drawn. The influence of Weissenberg number and power law exponent on the flow field is analyzed. In expansionary channel, as the increasing of power law exponent ,the velocity isoline moves towards channel,the flowing area is enlarged. With the increasing of Weissenberg number ,the swept volume and conformance efficiency are enhanced.
出处
《特种油气藏》
CAS
CSCD
2005年第4期36-39,i0009,i0010,共6页
Special Oil & Gas Reservoirs
基金
国家自然科学基金项目"聚合物溶液的粘弹性对驱替多孔介质中油作用机理研究"资助(课题编号:50174011)
关键词
粘弹性流体
修正上随体Maxwe
Ⅱ本构方程
幂律指数
威森博格数
扩张流道
viscoelastic fluid
modified upper- convected Maxwell constitutive equation
power law exponent
Weissenberg number
expansionary channel
