Turbulent drag reduction by polymer additives

Turbulent drag reduction by polymer additives: Fundamentals and ...

It is now generally agreed that, within the buffer layer, polymers reduce turbulent intensity by opposing its dominant flow structure—streamwise ...

Turbulent drag reduction by polymer additives - AIP Publishing

ABSTRACT. A small amount of polymer additives can cause substantial reduction in the energy dissipation and friction loss of turbulent flow. The prob-.

Turbulent drag reduction by polymer additives in parallel-shear flows

Abstract. In this study, we experimentally investigate the turbulent drag-reduction (DR) mechanism in flow through ducts of circular, ...

[1912.11524] Turbulent drag reduction by polymer additives - arXiv

A small amount of polymer additives can cause substantial reduction in the energy dissipation and friction loss of turbulent flow.

Turbulent Drag Reduction by Polymer Additives: A Survey

We first give a brief history of turbulent polymer drag reduction, and the position it has played relative to other drag reduction schemes, notably suction, ...

A mechanistic model of turbulent drag reduction by additives

A new mechanistic model of a polymer molecule in a turbulent flow field is suggested. It is argued that the dominant forces on a polymer fiber in the turbulent ...

Cooperative drag reduction in turbulent flows using polymer ...

The injection of long-chain polymer additives and the water-repellent (or superhydrophobic) texturing of submerged solid walls, ...

Mechanics and Prediction of Turbulent Drag Reduction with Polymer ...

additives, among other strategies (Gad-el Hak, 2000, Choi & Karniadakis, 2003). ... tions and advance our understanding of ﬂuid turbulence and ...

Turbulent drag reduction by polymer additives - Semantic Scholar

Water Soluble Polymers as a Means to Increase Flow Capacity: Field Experiment of Drag Reduction by Polymer Additives in an Irrigation Canal.

Most experimental results on drag reduction by polymer additives published to date have been obtained for tube flow. Tube flows have both advantages and ...

Mechanics and Prediction of Turbulent Drag Reduction with Polymer ...

This article provides a review of recent progress in understanding and predicting polymer drag reduction (DR) in turbulent wall-bounded shear flows.

Drag Reduction in Turbulent Flows by Polymer and Fiber Additives

The reduction in turbulent friction losses by the dilute addition of high-molecular weight polymers, fibers or other types of additives (e.g. surfactants) to ...

Drag reduction in turbulent flow by polymer additives - Lumley - 1973

A brief survey is given of the drag reduction phenomenon, emphasizing the aspects which must be explained by any theory: onset, the existence of intrinsic ...

Turbulent drag reduction with polymer additive in rough pipes

Turbulent drag reduction with polymer additive in rough pipes - Volume 642.

Drag Reduction in Turbulent Flow With Polymer Additives

This study reveals that the mixing-length theorem is valid to express the drag-reducing phenomenon and that the presence of polymer additives increases the ...

Turbulent drag reduction with polymer additive in rough pipes

Both experimental data and theoretical predictions indicate that, if same polymer solution is used, the drag reduction (DR) in roughened pipes ...

Cooperative drag reduction in turbulent flows using polymer ...

"Cooperative drag reduction in turbulent flows using polymer additives and superhydrophobic walls." Physical Review Fluids, 5 (11). Version ...

Mechanics and Prediction of Turbulent Drag Reduction with Polymer ...

The reduction in turbulent friction losses by the dilute addition of high–molecular weight polymers to flowing liquids has been extensively studied since the ...

Increase of turbulent drag by polymers in particle suspensions

T. Min, J. Y. Yoo, H. Choi, and D. D. Joseph, Drag reduction by polymer additives in a turbulent channel flow, ...

Drag reduction by polymer additives in a turbulent channel flow

Turbulent drag reduction by polymer additives in a channel is investigated using direct numerical simulation. The dilute polymer solution is expressed with ...