Viscosity effects in foam drainage: Newtonian and non-newtonian foaming fluids

The European Physical Journal. E, Soft Matter
M SafouaneD Langevin

Abstract

We have studied the drainage of foams made from Newtonian and non-Newtonian solutions of different viscosities. Forced-drainage experiments first show that the behavior of Newtonian solutions and of shear-thinning ones (foaming solutions containing either Carbopol or Xanthan) are identical, provided one considers the actual viscosity corresponding to the shear rate found inside the foam. Second, for these fluids, a drainage regime transition occurs as the bulk viscosity is increased, illustrating a coupling between surface and bulk flow in the channels between bubbles. The properties of this transition appear different from the ones observed in previous works in which the interfacial viscoelasticity was varied. Finally, we show that foams made of solutions containing long flexible PolyEthylene Oxide (PEO) molecules counter-intuitively drain faster than foams made with Newtonian solutions of the same viscosity. Complementary experiments made with fluids having all the same viscosity but different responses to elongational stresses (PEO-based Boger fluids) suggest an important role of the elastic properties of the PEO solutions on the faster drainage.

References

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Sep 28, 2004·The European Physical Journal. E, Soft Matter·A Saint-JalmesD Langevin
Nov 18, 2005·Journal of Colloid and Interface Science·Anh V Nguyen

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Citations

Sep 28, 2004·The European Physical Journal. E, Soft Matter·A Saint-JalmesD Langevin
May 9, 2006·Journal of Colloid and Interface Science·G MaurdevD Langevin
Jan 18, 2015·Journal of Colloid and Interface Science·Sébastien GauchetDominique Langevin
Apr 24, 2015·Soft Matter·Yiran Zhang, Vivek Sharma
Mar 20, 2008·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Sascha HilgenfeldtJih-Chiang Tsai
Jun 20, 2007·Journal of Physics. Condensed Matter : an Institute of Physics Journal·V Bertola
Jul 20, 2010·The Journal of Pharmacy and Pharmacology·Yanjun ZhaoMarc B Brown
Sep 19, 2006·Soft Matter·Arnaud Saint-Jalmes
Jul 15, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Florent CarnRénal Backov
Aug 29, 2009·Langmuir : the ACS Journal of Surfaces and Colloids·Bruno JeanVance Bergeron
Aug 14, 2008·Langmuir : the ACS Journal of Surfaces and Colloids·K GolemanovA Lips
Aug 29, 2018·Langmuir : the ACS Journal of Surfaces and Colloids·Audrey ArnouldAnne-Laure Fameau

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