[HTML][HTML] Turbulent drag reduction by polymer additives: Fundamentals and recent advances
L Xi - Physics of Fluids, 2019 - pubs.aip.org
A small amount of polymer additives can cause substantial reduction in the energy
dissipation and friction loss of turbulent flow. The problem of polymer-induced drag …
dissipation and friction loss of turbulent flow. The problem of polymer-induced drag …
Polymer drag reduction: A review through the lens of coherent structures in wall-bounded turbulent flows
The current work qualitatively surveys the phenomenon of polymer drag reduction from the
standpoint of the salient coherent motions in the near-wall region of wall-bounded turbulent …
standpoint of the salient coherent motions in the near-wall region of wall-bounded turbulent …
Elasto-inertial turbulence
Turbulence is ubiquitous in nature, yet even for the case of ordinary Newtonian fluids like
water, our understanding of this phenomenon is limited. Many liquids of practical importance …
water, our understanding of this phenomenon is limited. Many liquids of practical importance …
[HTML][HTML] Drag reduction and the dynamics of turbulence in simple and complex fluids
MD Graham - Physics of Fluids, 2014 - pubs.aip.org
Addition of a small amount of very large polymer molecules or micelle-forming surfactants to
a liquid can dramatically reduce the energy dissipation it exhibits in the turbulent flow …
a liquid can dramatically reduce the energy dissipation it exhibits in the turbulent flow …
On the mechanism of elasto-inertial turbulence
Elasto-inertial turbulence (EIT) is a new state of turbulence found in inertial flows with
polymer additives. The dynamics of turbulence generated and controlled by such additives …
polymer additives. The dynamics of turbulence generated and controlled by such additives …
The Oldroyd-B fluid in elastic instabilities, turbulence and particle suspensions
ESG Shaqfeh, B Khomami - Journal of Non-Newtonian Fluid Mechanics, 2021 - Elsevier
The Oldroyd-B fluid has become the starting point for almost all complex flow calculations
and analysis involving the behavior of dilute polymer solutions. The reasons for this are …
and analysis involving the behavior of dilute polymer solutions. The reasons for this are …
Dynamics of viscoelastic pipe flow at low Reynolds numbers in the maximum drag reduction limit
Polymer additives can substantially reduce the drag of turbulent flows and the upper limit,
the so-called state of 'maximum drag reduction'(MDR), is to a good approximation …
the so-called state of 'maximum drag reduction'(MDR), is to a good approximation …
Turbulent drag reduction by polymer additives in parallel-shear flows
BE Owolabi, DJC Dennis, RJ Poole - Journal of Fluid Mechanics, 2017 - cambridge.org
In this study, we experimentally investigate the turbulent drag-reduction (DR) mechanism in
flow through ducts of circular, rectangular and square cross-sections using two grades of …
flow through ducts of circular, rectangular and square cross-sections using two grades of …
On the scaling of air entrainment from a ventilated partial cavity
SA Mäkiharju, BR Elbing, A Wiggins… - Journal of Fluid …, 2013 - cambridge.org
The behaviour of a nominally two-dimensional ventilated partial cavity was examined over a
wide range of size scales and flow speeds to determine the influence of Froude, Reynolds …
wide range of size scales and flow speeds to determine the influence of Froude, Reynolds …
A direct comparison of turbulence in drag-reduced flows of polymers and surfactants
L Warwaruk, S Ghaemi - Journal of Fluid Mechanics, 2021 - cambridge.org
We experimentally compared the drag-reduced turbulent channel flow of three different
additives: a flexible polymer, a rigid polymer and a surfactant. A high drag reduction (HDR) …
additives: a flexible polymer, a rigid polymer and a surfactant. A high drag reduction (HDR) …