@phdthesis{19906,
  abstract     = {Flows of ordinary fluids such as water or air transition from laminar to turbulent
motion as the velocity increases. This simple dependence of the flow state
solely on inertia, does not apply to more complex substances such as polymericand biofluids which commonly have elastic as well as viscous properties. Here
various different instabilities and turbulent states can arise at low and even
vanishing inertia, while high inertia turbulence counterintuitively is suppressed
and its drag strongly reduced. We here show in experiments of a viscoelastic
model fluid that the phenomena observed at low and high inertia have a
common origin and that the same dynamical state, elasto-inertial turbulence,
persists across four orders of magnitude in Reynolds number, ranging from
very low inertia, all the way to high inertia Maximum drag reduction (MDR)
asymptote. We also explore the transitions from Newtonian turbulence to
MDR, and specific cases of flow at high polymer concentrations, exploring the
relationship between flow at these wide range of control parameters.
},
  author       = {Suresh, Sarath S},
  issn         = {2663-337X},
  pages        = {82},
  publisher    = {Institute of Science and Technology Austria},
  title        = {{Turbulence in polymeric flows : A characterisation of elasto-inertial turbulence and the maximum drag reduction asymptote}},
  doi          = {10.15479/AT-ISTA-19906},
  year         = {2025},
}