Internal viscoelastic waves in a circular Couette flow of a dilute polymer solution
Department of Physics of Complex Systems
The Weizmann Institute of Science - Rehovot 76100, Israel
2 Department of Physics, University of California - San Diego, CA 92093, USA
Accepted: 16 September 2002
The existence of internal viscoelastic waves below the elastic instability threshold in the circular Couette flow of a polymer solution is predicted. We present results of calculations of the dispersion relation of the waves. These weakly attenuating waves are sustained by a non-uniform elastic stress distribution and should occur in the region of stable stratification of the hoop elastic stresses in any viscoelastic fluid flow with curvilinear trajectories.
PACS: 47.50.+d – Non-Newtonian fluid flows / 83.60.Bc – Linear viscoelasticity / 61.25.Hq – Macromolecular and polymer solutions; polymer melts; swelling
© EDP Sciences, 2002