Origin of the slow linear viscoelastic response of aqueous foams.

@article{CohenAddad2004OriginOT,
  title={Origin of the slow linear viscoelastic response of aqueous foams.},
  author={Sylvie Cohen-Addad and Reinhard H{\"o}hler and Yacine Khidas},
  journal={Physical review letters},
  year={2004},
  volume={93 2},
  pages={028302}
}
We have studied the slow linear viscoelastic response of wet aqueous foams by macroscopic creep compliance measurements, combined to a diffusing-wave spectroscopy investigation of the local dynamics. The data strongly suggest that this rheological response arises from two distinct relaxation mechanisms: The first is due to the coarsening induced bubble rearrangements and governs the steady-state creep; the second results from the interplay between surface tension and surface viscosity of the… CONTINUE READING