Download or read book Drag of Circular Cylinders in Dilute Aqueous Solutions of Poly ethylene Oxide for Flows Characterized by Laminar Boundary Layer Separation written by Ted McClanahan and published by . This book was released on 1968 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Circular cylinders of diameters from 1/4 in. to 2 in. and length to diameter ratios of 5, 10, and 40 were towed by a whirling arm of 2 meter diameter in Polyox WSR-301 aqueous solutions of 10, 50, 100, and 200 wppm (weights part per million) concentration. Drag forces, measured with a strain gauge, ranged from 10 gm to 3,500 gm for velocities ranging from 15 cm/sec to 6 m/sec. In this way, drag coefficients were obtained for a Reynolds number range of 2000 to 200,000 (based on diameter and the kinematic viscosity of water). Drag reduction was obtained for Re> 10,000 with the amount of reduction increasing with increasing Reynolds number. The largest amount of drag reduction was measured in the 100 wppm solutions. Qualitative observations on vortex-shedding frequency and surface-wave reduction were also made. The hypothesis that the polymer produces drag reduction by displacing the separation point was strongly supported by these findings. (Author).
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1972 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 818 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flow of Dilute Polymer Solutions about Circular Cylinders written by Turgut Sarpkaya and published by . This book was released on 1971 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: Flow of aqueous solutions of Polyox WSR-301, with concentrations of 1.0 to 200 wppm, past circular cylinders was investigated in the drag-transition region of Reynolds numbers. Drag force, pressure distribution, and separation angle were measured on cylinders with diameters from 1/4 to 1-1/2 inch. Lift and drag forces acting on a NACA-0024 hydrofoil-model were also measured. The polymer additive was found to alter only those force coefficients which have a Reynolds-number transition region. Two distinct types of cylinder drag transition were observed: (1) At high concentrations, transition from sub-critical to a transcritical flow occurred at the same free-stream velocity independent of body diameter; and (2) at low concentrations and/or molecular weights, tripping from a sub-critical to a super-critical flow occurred at a well defined flow condition which was a function of free-stream velocity, body diameter, and turbulent pipe-flow friction reduction. In all cases, transition occurred earlier than that in the pure solvent. The polymer had a de-stabilizing effect on the boundary-layer flow.
Download or read book Abstracts of Dissertations Theses and Research Papers Submitted by Candidates for Degrees written by Naval Postgraduate School (U.S.) and published by . This book was released on 1966 with total page 628 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Compilation of Abstracts of Dissertations Theses and Research Papers Submitted by Candidates for Degrees written by Naval Postgraduate School (U.S.) and published by . This book was released on 1967 with total page 792 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Heat Transfer written by Young I. Cho and published by Academic Press. This book was released on 2011-11-23 with total page 459 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Heat Transfer fills the information gap between regularly scheduled journals and university-level textbooks by providing in-depth review articles over a broader scope than in journals or texts. The articles, which serve as a broad review for experts in the field, will also be of great interest to non-specialists who need to keep up-to-date with the results of the latest research. This serial is essential reading for all mechanical, chemical and industrial engineers working in the field of heat transfer, graduate schools or industry. - Provides an overview of review articles on topics of current interest - Bridges the gap between academic researchers and practitioners in industry - A long-running and prestigious series
Download or read book Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States written by and published by . This book was released on 1968 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Master s Theses and Doctoral Dissertations in the Pure and Applied Sciences written by and published by . This book was released on 1969 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1971 with total page 1330 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Government Research Development Reports written by and published by . This book was released on 1970 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements written by and published by . This book was released on 1970 with total page 1228 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Viscous Drag Reduction written by C. Sinclair Wells and published by Springer. This book was released on 2013-12-20 with total page 497 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Flow Drag reduction by Dilute Poly ethylene Oxide Solutions in Capillary Tubes written by Ira Michael Felsen and published by . This book was released on 1971 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study was initiated to investigate turbulent flow drag-reduction by dilute poly(ethylene oxide) solutions in capillary tubes and thereby elucidate the mechanism of drag-reduction through interpretation of the experimental results. Flow through capillary tubes was chosen as a means to (1) obtain a large ratio of solid surface area to fluid volume, and (2) obtain high shear stresses at low Reynolds numbers. This allowed investigation of surface effects and polymer degradation as a function of a number of variables which are known to influence drag-reduction. (Author).
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1970-05 with total page 956 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1970 with total page 1002 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Drag Reduction written by American Institute of Chemical Engineers and published by . This book was released on 1971 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt:
