Download or read book On the Turbulent Flow of Dilute Polymer Solutions written by Myles Walsh and published by . This book was released on 1967 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book On the Turbulent Flow of Dilute Polymer Solutions written by Myles Alexander Walsh and published by . This book was released on 1967 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chain Scission in Turbulent Flow of Dilute Polymer Solutions written by Brian G. Price and published by . This book was released on 2002 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Turbulent Flow Properties of Dilute Polymer Solutions written by M. T. Goodall and published by . This book was released on 1974 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pipe Flow of Dilute Polymer Solutions written by Chien-Bang Wang and published by . This book was released on 1969 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Numerical Study on the Propagation of Turbulent Fronts in Dilute Polymer Solutions written by Cocconi, Giacomo and published by KIT Scientific Publishing. This book was released on 2020-01-14 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbulent Flow of Dilute Polymer Solutions Studies in Couette Flow written by Tae-Sup Lee and published by . This book was released on 1966 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the thesis was to investigate the phenomenon of drastic reduction of turbulent drag (friction stress) in a micromolecular liquid by the addition of soluble high-polymer substances.

Download or read book Drag Reduction in Flow of Dilute Polymer Solutions written by James Henry Hand and published by . This book was released on 1971 with total page 680 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effects of Dilute Polymer Solutions on Turbulent Flow in Rough Pipes written by Ronald Takashi Kobayashi and published by . This book was released on 1971 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Turbulent Flow Drag Reduction and Degradation with Dilute Polymer Solutions written by Robert W. Paterson and published by . This book was released on 1969 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: The purpose of the study was to attempt to find an explanation for the phenomenon first reported by Toms in 1948 in which the addition of a few grams of a long chain polymer to a million cubic centimeters of a Newtonian solvent caused a large decrease in the turbulent pipe flow pressure drop while causing only a small increase in the laminar flow viscosity. This phenomenon, which has been observed to occur for a number of different polymers and solvents, is commonly referred to as 'drag reduction with dilute polymer solutions' or 'the Toms phenomenon'. (Author).

Download or read book Turbulent Flow Drag Reduction with Dilute Polymer Solutions written by Robert William Paterson and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Similarity Laws for Turbulent Flow of Dilute Solutions of Drag reducing Polymers written by T. T. Huang and published by . This book was released on 1973 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: Velocity similarity laws, based on a four-layer, mean-velocity-profile model are deduced for turbulent boundary layers with dilute polymer solutions by means of pipe-flow experiments. Measured drag reduction is studied in three domains: undersaturated, optimal, and oversaturated. Drag reduction increases with increasing concentration in the undersaturated domain where the four-layer profile exists in the boundary layer. The boundary between the two domains gives optimal drag reduction; it is determined by the polymer type and concentration and by a Reynolds number based on shear velocity and boundary-layer thickness. The effects of solvent temperature, pipe diameter, polymer type and concentration, and wall shear stress on the measured drag reduction have been investigated. (Modified author abstract).

Download or read book The Toms Phenomenon written by Preetinder Singh Virk and published by . This book was released on 1966 with total page 906 pages. Available in PDF, EPUB and Kindle. Book excerpt: Drag reduction caused by dilute, distilled water solutions of five polyethylene oxides, molecular weights from 80,000 to 6,000,000, in turbulent pipe flow was studied experimentally in 0.292 cm and 3.21 cm ID pipes. It was found that: The onset of drag reduction occurs at a well-defined wall shear stress related to the random coiling effective diameter of the polymer by the Onset Hypothesis. Laminar to turbulent transition is not, in general, delayed. The extent of drag reduction induced by a homologous series of polymers in a given pipe is a universal function of concentration, uniquely related to flow rate and molecular weight. The maximum drag reduction possible is limited by a universal asymptote that is independent of polymer and pipe diameter. In polymer solution, both the stagnation pressure attained with Pitot tubes and the heat transfer from cylinders in cross flow are drastically different from Newtonian; in general, both are lower. (Author).

Download or read book ASME 67 WA FE 3 written by Y. Goren and published by . This book was released on 1967 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies on the Turbulent Flow and Viscoelastic Properties of Dilute Non Newtonian Polymer Solutions written by Donald Mervyn Meter and published by . This book was released on 1964 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Reduction of Drag in Turbulence by Dilute Polymer Solutions written by Hyunkook Shin and published by . This book was released on 1965 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt: The object of this thesis was to investigate the drag reduction phenomenon in turbulent flow caused by random coiling macromolecules in 'dilute' solution. In particular, this thesis was concerned with the relationship of drag (or its reduction) to the size of the coils and their concentration, of two kinds of polymers differing significantly in chain flexibility: polyethylene oxide (PEO), the more flexible, and polyisobutylene (PIB), the less flexible. It was found that, within any given homologous polymer series, the ability of macromolecules to reduce drag improved drastically with increasing molecular weight. That is, the concentration of polymers in solution either in the absolute weight fraction or in the effective volume fraction required to yield a given percent drag reduction decreased rapidly with increasing molecular weight. It was further found that there always existed an optimum concentration for any given polymer system at which the observed drag reduction reached a maximum.

Download or read book Drag Reduction by Dilute Polymer Solutions in Turbulent Flow written by Ralph C. Little and published by . This book was released on 1967 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The mechanism by which water-soluble polymers reduce hydrodynamic drag on solid surfaces was investigated by measurements of flow birefringence and of turbulent flow in pipes. Flow birefringence and flow field orientation of Polyox polymers in the molecular weight range from 200,000 to 6,000,000 showed that Polyox macromolecules continue to deform with increasing velocity gradient even after alignment with the flow field (at gradients in excess of 2000/sec). All solutions used were found to be Newtonian, with the exception of the AcrysolA-5 solutions. The flow data for Polyox solutions in a Pyrex pipe were examined in terms of Meyer's fluid property parameter and Elata's relaxation time hypothesis for the initiation of drag reduction. It was found that drag reduction in the Pyrex pipe was initiated at a value of the order of one-fifth that predicted by Elata's theory. Moreover, added salt (the solution being 0.3 molar in K2SO4) had no effect on the flow of Polyox Coagulant solutions even though the intrinsic viscosity (upon which Rouse relaxation times depend) was cut to slightly more than one-third of its value in the pure solvent. The unusually high values of Meyer's fluid property parameter observed at low concentrations suggests that adsorption on the Pyrex pipe walls may be playing a role in drag reduction. (Author).