Deformation-dependent hydrodynamic interaction in flows of dilute polymer solutions
Deformation-dependent hydrodynamic interaction in flows of dilute polymer solutions
复制标题
稀聚合物溶液流中变形相关的流体动力相互作用
DOI：
--
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
M. Mackay
中科院分区：
文献类型：
--
作者：
J. Magda;R. Larson;M. Mackay
我们已经扩展了珠弹簧模型的Zimm，包括流体动力学相互作用，这取决于构象的聚合物，因此变形率。我们的计算方案是基于模型的Fixman，它使我们能够调查大到500珠的数值链。主要的近似是用组态平均值代替流体力学相互作用张量。我们发现，结合配置依赖的流体动力学相互作用定性地改变了齐姆预测的剪切和拉伸粘度。特别地，拉伸粘度变成拉伸速率的多值函数。这一结果与de Gennes和Hinch预测的弹簧圈-拉伸转变一致。
We have extended the bead–spring model of Zimm to include hydrodynamic interaction that depends upon the conformation of the polymer and hence the deformation rate. Our computational scheme is based on the model of Fixman, and it allows us to investigate numerically chains as large as 500 beads. The major approximation is the replacement of the hydrodynamic interaction tensor with its configurational average. We find that the incorporation of configuration‐dependent hydrodynamic interaction qualitatively changes the Zimm predictions for both the shear and the elongational viscosity. In particular, the elongational viscosity becomes a multivalued function of the rate of elongation. This result is consistent with the coil‐to‐stretch transition predicted by de Gennes and Hinch.