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3 edition of Polymeric Concentration Determined by Drag Reduction. found in the catalog.

Polymeric Concentration Determined by Drag Reduction.

United States. Bureau of Mines.

Polymeric Concentration Determined by Drag Reduction.

by United States. Bureau of Mines.

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Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesReport of investigations (United States. Bureau of Mines) -- 8559
ContributionsZatko, J.
ID Numbers
Open LibraryOL21738675M

of drag reduction to be expected for a given polymer-solvent system in a tube of a specified diameter. From a practical point of view, a correlation that would permit the calculation of the amount of drag reduction would be desirable. This work was concerned with obtaining a correlation starting with the. Effectiveness of a drag reducing polymer: Relation to molecular weight distribution and structuring Physics of Flu ( “ Effects of electric fields on polymeric drag reduction,” J. Colloid Interface Sci. 60, (). Google Scholar Crossref; 7. J. H. by:

THE ErFECT OF POLYMER STRUCTURE ON DRAG REDUCTION IN. NONPOLJ~ SOLVENTS. by. GIN CHAIN LIAW and of polyrr,er sol" concentration on drag reduction in rwnpolar sclver:ts Here studied in this investigation. Three samples of polydimethyl siloxane (r-1 = 7, xlo 6, v. i. Abstract This paper presents experimental results of the effects of coiled tubing curvature on the drag reduction behavior of polymeric fluids in turbulent flow. The experimental setup consists of a ft section of 1/2-in. OD straight tubing and foCited by: 2.

Drag reduction in laminar flow using hydrophobic surfaces fabricated by silicon wafers was carried out and pressure reductions up to 40% were reported Jia et al (). However, the development of such surfaces might invite some theoretical complications as cited by Troung(). Drag reduction was studied in laminar flow by Driels and Ayyash. @article{osti_, title = {Drag reduction in hydrocarbon-aluminum soap polymer systems}, author = {Zakin, J.L. and Lee, K.C.}, abstractNote = {While the drag-reducing capability of solutions of aluminum soap in hydrocarbons in turbulent flow has been known for over 20 yr, investigations of the effects of concentration, soap type, and aging on drag reduction have only recently begun.


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Polymeric Concentration Determined by Drag Reduction by United States. Bureau of Mines. Download PDF EPUB FB2

Get this from a library. Polymeric concentration determined by drag reduction. [Jalna R Zatko]. NIOSHTIC-2 Publications Search. Polymeric Concentration Determined by Drag Reduction. Authors Zatko-JR Source A means for determining low concentrations of polymeric solutions was devised that was independent of slight fluctuations in solvent quality in order to measure polymers in effluent prior to recycling of the recovered solution.

A ½-in. OD, ft straight section was also included to compare the drag reduction behavior between ST and CT. Various concentrations of the drag-reducing fluid were tested. The optimum concentration was subsequently determined from the results of drag reduction exhibited by fluid.

The polymeric species, experimental parameters, and numerical analysis of these water-soluble polymers in turbulent drag reduction are highlighted, along with several existing and potential.

In Fig. 6 the percent drag reduction is plotted versus polymer concentration for 1 ″ smooth and rough pipes at the same flow conditions.

It is observed that in rough pipe the drag reduction is more than smooth pipe. The reason for this phenomenon is that as it is known the DRAs are effective only in turbulent flow and their effects are enhanced by the degree of by: The JASON Summer Study on Drag Reduction focused on the physics which underlies methods utilizing polymer additives.

The study in-cluded a review of drag reduction phenomenology, the development of con-tinuum models of the dynamics of dilute polymer solutions, the introductionFile Size: 1MB.

The remarkable ability of polymeric additives to reduce the level of frictional drag significantly in turbulent flow, even under extremely low dilutions, is known as turbulent drag-reduction behavior. Polymers are effective drag reducers owing to their ability to suppress the formation of turbulent eddies at low concentrations.

Existing drag reduction methods can be generally classified into additive and non-additive techniques. The polymer additive based method is categorized under additive techniques. Other drag reducing additives are fibers and by: 9. experimental data, a drag reduction in the range of 10% can be achieved with the effect becoming more pronounced the higher the Reynolds number.

Keywords: Drag reduction, Taylor instabilities, Couette flow, Rotating disk, Polymeric and surfactant additives. NOMENCLATURE a Disk Radius b Disk thickness c Radial gap between disk and enclosure. The additives causing drag reduction can be divided in three groups: polymers, surfactants and fibres.

A detailed description of the drag reduction phenomenon is given by Gyr and Bewersdorff [2]. In this paper we will restrict ourselves to drag reduction of turbulent pipe flow by long flexible polymers, which are dissolved in water.

Turbulent Drag Reduction by Dilute Solution of Polymers In collaboration with T.S. Lo (TL), A. Pomyalov (AP), I. Procaccia (IP), V. Tiberkevich (VT). – Weizmann Inst., Rehovot, Israel Roberto Benzi, Elizabeth de Angelis, Carlo Casciola – Rome Univ., Italy and Emily Ching – Hong Kong Univ.

Tullis JP, Ramu KLV () “Drag reduction in developing pipe flow with polymer injection” Intern Conf on Drag Reduction, paper G 3, Cambridge Google Scholar Usui H, Kodama M, Sano Y () “Drag reduction with heterogeneous polymer injection into a turbulent pipe flow” Technol Rep Yamaguchi Univ 4: 51 Google ScholarCited by:   Read "Degradation accompanying turbulent drag reduction by polymer additives, Journal of Non-Newtonian Fluid Mechanics" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

The ppm CMC solution was selected as the best polymer concentration with highest drag reduction efficiency. For polymer-surfactant combinations, CMC-AlfonicCMC-Alfonic, CMC-Stepanol and CMC-Stepwet systems were found to have significant interactions.

High surfactant concentration resulted in reduction in %DR. Water-soluble polymers with high molecular weights are known to decrease the frictional drag in turbulent flow very effectively at concentrations of tens or hundreds of ppm.

This drag reduction efficiency of water-soluble polymers is well known to be closely associated with the flow conditions and rheological, physical, and/or chemical characteristics of the polymers by: The onset of drag reduction by dilute polymer additives, and the maximum drag reduction asymptote By KATEPALLI R.

SREENIVASAN AND CHRISTOPHER M. WHITE Mason Laboratory, Yale University, New Haven, CTUSA (Received 31 December and in revised form 29 October ).

Reynolds number dependence of drag reduction by rodlike polymers Yacine Amarouchene,1 Daniel Bonn,2 Hamid Kellay,1 Ting-Shek Lo,3 Victor S.

L’vov,3 and Itamar Procaccia3 1CPMOH, U. Bordeaux 1, Cours de la Libération, Talence, France 2LPS, ENS, 24 Rue Lhomond, Paris, France and van der Waals-Zeeman Instituut, University of Amsterdam, Valckenierstr XE. Skin-Friction Drag Reduction by Dilute Polymer Solutions in Turbulent Channel Flow by Dong-Hyun Lee A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy (Mechanical Engineering) in The University of Michigan Doctoral Committee: Associate Professor Rayhaneh Akhavan, Chair Professor.

Drag reduction by polymer is an important energy-saving technology, which can reduce pumping pressure or promote the flow rate of the pipelines transporting fluid. It has been widely applied to single-phase pipelines, such as oil pipelining, district heating systems, and firefighting. However, the engineering application of the drag reduction technology in two-phase flow systems has not been Cited by: 4.

Achieving Drag Reduction Through Polymer-Surfactant Interaction by Anosh Mevawalla Drag reduction is a well-observed phenomenon, it was first observed by the British chemist determine if any interaction was present and at what concentration was this most notable 4 techniques were used: Surface tension, Conductivity, Relative Viscosity.

In Toms discovered by experiments that the addition of a small amount of polymer into a turbulent Newtonian solvent (parts per million by weight), which results in a Non-Newtonian fluid solution, can reduce the skin frictional drag on a stationary surface by up to 80%.

This technology has been successfully implemented to reduce pumping cost for oil pipelines, to increase the flow rate in.Description. Drag reducing agents can be broadly classified under the following four categories – Polymers, Solid-particle suspensions, Biological additives, and agents are made out of high molecular weight polymers or micellar systems.

The polymers help with drag reduction by decreasing turbulence in the oil lines. This allows for oil to be pumped through at lower.Shah and Zhou () investigated drag-reduction behavior using a full-scale coiled-tubing test facility that was established for the joint-industry Coiled Tubing Consortium.

Useful observations on the effects of polymer concentration and coiled-tubing curvature on drag reduction were provided.