进行了稳定剪切流下稀疏表面活性剂溶液的三维布朗动力学数值模拟.将溶液内部胶束粒子假设为由球体依次线性联结所构成,分别用Lennard-Jones势和软球势来描述不同粒子端部球和内部球相互之间的作用.采用Verlet速度算法进行模拟,得到了不同剪切率下胶束结构和流变特性.在低剪切率下可得到表面活性剂溶液内部的网状胶束结构,该结构在高剪切率下遭到破坏.剪切粘度和第一正应力系数呈剪切稀化特征.揭示了溶液内部结构和流变特性的关系.
参考文献
| [1] | White A .Flow Characteristics of Complex Soap Systems[J].Nature,1967,214:585-586. |
| [2] | Lu B;Li X;Zakin J L et al.A Non-Viscoelastic Drag-Reducing Cationic Surfactant System[J].Journal of Non-Newtonian Fluid Mechanics,1997,71:59-72. |
| [3] | Clausen T M;Vinson P K;Minter J R et al.Viscoelastic Micellar Solutions:Microscopy and Rheology[J].Journal of Physical Chemistry,1992,96:474-484. |
| [4] | Liu T W .Flexible Polymer Chain Dynamics and Rheological Properties in Steady Flows[J].Journal of Chemical Physics,1989,90:5826-5842. |
| [5] | Allen M P;Tildsley D J.Computer Simulation of Liquids[M].Oxford:Oxford Science,1987 |
| [6] | Lu B .Characterization of Drag-Reducing Surfactant Systems by Rheology and Flow Birefringence Measurements[D].Ohio:The Ohio State University,1997. |
| [7] | Bird R B;Curtiss C F;Armstrong R C.Dynamics of Polymeric Liquids:Vol.2,Kinetic Theory[M].John Wiley and Sons,Inc,1987 |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%