Influence of system size and solvent flow on the distribution of wormlike micelles in a contraction-expansion geometry.

The European Physical Journal. E, Soft Matter
M R StukanJ P Crawshaw

Abstract

Viscoelastic wormlike micelles are formed by surfactants assembling into elongated cylindrical structures. These structures respond to flow by aligning, breaking and reforming. Their response to the complex flow fields encountered in porous media is particularly rich. Here we use a realistic mesoscopic Brownian Dynamics model to investigate the flow of a viscoelastic surfactant (VES) fluid through individual pores idealized as a step expansion-contraction of size around one micron. In a previous study, we assumed the flow field to be Newtonian. Here we extend the work to include the non-Newtonian flow field previously obtained by experiment. The size of the simulations is also increased so that the pore is much larger than the radius of gyration of the micelles. For the non-Newtonian flow field at the higher flow rates in relatively large pores, the density of the micelles becomes markedly non-uniform. In this case, we find that the density in the large, slowly moving entry corner regions is substantially increased.

References

Mar 1, 1996·Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics·M Kröger, R Makhloufi
Oct 20, 2004·Langmuir : the ACS Journal of Surfaces and Colloids·Isabelle CouilletS Jean Candau
Nov 5, 2004·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·J T Padding, E S Boek
May 7, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Beth A SchubertSrinivasa R Raghavan
Feb 14, 2006·The Journal of Physical Chemistry. B·J PenfoldN Ruddock
Sep 13, 2006·The Journal of Chemical Physics·C-C HuangJ-P Ryckaert
Mar 20, 2008·Soft Matter·Mikhail R StukanJohn P Crawshaw

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Citations

Jun 25, 2014·Advances in Colloid and Interface Science·Ya ZhaoAmy Q Shen
Sep 13, 2015·The European Physical Journal. E, Soft Matter·Meisam Asgari
Jun 17, 2020·Journal of Chemical Theory and Computation·Breanndan O ConchuirThomas J Peters

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