Download or read book Effect of Transverse Convex Surface Curvature on Fluid Flow and Heat Transfer in the Entrance Region of Concentric Annuli written by and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Transverse Convex Surface Curvature on Turbulent Fluid Flow and Heat Transfer in Concentric Annuli with Moving Cores written by Sang Hun Lee and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study investigates the effect of Transverse Convex Surface Curvature of the inner core (T.C.S.C) on the fully developed fluid flows in a concentric annulus with a moving core, by analytically predicting friction forces, velocity profiles, temperature profiles and heat transfer in terms of convex surface curvature, radius ratio, Prandtl number, Reynolds number and relative velocity. The analytical predictions are produced by a mathematical model based on the variable von Karman constant, kappai, proposed by Kim and Lee [1] and the variable van Driest damping parameter, Ai+, proposed in previous research by Suk [2]. The computer program developed for this study employs a numerical process to match velocity and temperature profiles with force and energy balances and calculates the desired momentum and thermal characteristics. The solutions are found in the case of the heat transfer where the inner core surface is uniformly heated and the outer insulated. It is assumed that the fluid flow is turbulent everywhere and the thermodynamic fluid properties are independent of temperature. It is concluded that in the fully developed turbulent flow in a concentric annulus with a moving core, the effects of Transverse Convex Surface Curvature (T.C.S.C), core velocity and turbulent motion on the momentum and heat transfer characteristics of the flow seem significant.
Download or read book Effect of Transverse Convex Surface Curvature on Turbulent Fluid Flow and Heat Transfer in Concentric Annuli with Moving Cores microform written by Sang Hun Lee and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2001 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Transverse Convex Surface Curvature on Turbulent Fluid Flow and Heat Transfer written by Man-Woong Kim and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The effect of transverse convex surface curvature on turbulent boundary layer flow and heat transfer over circular cylinders, and on fully developed turbulent flow and heat transfer in concentric annular ducts with smooth surfaces are studied both analytically and experimentally. The analytical results are obtained through a turbulence model based on the variable von Karman's constants, $\rm\kappa\sb{i}$, proposed for the first time in the present study. A computer program is developed for calculation of the desired momentum and thermal characteristics. A numerical calculation using the standard k-$\varepsilon$ turbulence model, with a modified procedure is also carried out. It is assumed that the thermodynamic fluid properties are independent of temperature. An experimental study is conducted to study the effect of the transverse convex surface curvature of the core tubes both on fully developed turbulent flows and heat transfer in concentric annular ducts. Air is used as the working fluid. Three annuli having different radii of the inner cores, R$\rm\sb{i}$ = 3.98 mm, 8.57 mm, and 16.7 mm, with a fixed radius ratio of $\alpha$ = 0.3, are used over a range of the Reynolds number between about 20,000 and 60,000. The inner cores are heated electrically to provide constant heat fluxes throughout the test sections and are instrumented for the temperature and power measurements. The outer tubes are insulated to minimize the leakage of heat. In the case of the experimental study for turbulent boundary layer flows and heat transfer on circular cylinders, the experimental data of Willmarth et al. (31) and Kim and Lee (45, 46) are recompiled for the present study. It is seen that both the friction coefficient and heat transfer increase with decreasing value of the inner core radius of concentric annuli and the radius of circular cylinders, R$\rm\sb{i}$ It is concluded that, while the effect of transverse concave curvature on fluid flow and heat transfer is negligible, that of transverse convex curvature is rather significant.
Download or read book Heat Transfer and Pressure Drop in Eccentric Annuli written by Theodore Diskind and published by . This book was released on 1961 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effects of convex surface curvature on heat transfer in turbulent flow written by Constantinos Alexandros Verriopoulos and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chemical Abstracts written by and published by . This book was released on 2002 with total page 2710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effect of Transverse Temperature Gradients on the Heat Transfer and Friction for Laminar Flow of Gases written by Monty E. Davenport and published by . This book was released on 1962 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Turbulent Fluid Flow and Heat Transfer Induced by Square ribbed Surface Roughness in Concentric Annuli written by Soo W. Ahn and published by . This book was released on 1990 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present study demonstrates that certain artificial roughness elements may be used to enhance heat transfer rates with advantages from the overall efficiency point of view.
Download or read book The Heat Transfer and Fluid Dynamics of Concave Surface Curvature written by Peter Bradshaw and published by . This book was released on 1988 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Transverse Convex Curvature on Heat Transfer from Uniformly Heated Surface with Backward facing Steps written by Mossadeg Saadat Niaki and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: An empirical equation, correlated as a function of Reynolds number and aspect ratio of cylinder-step diameters, is proposed for the maximum Nusselt number.
Download or read book Laminar Flow and Heat Transfer in the Entrance Region of Ribbed Concentric Annuli written by Joseph Roger Stevenson and published by . This book was released on 1994 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modelling of Convective Heat and Mass Transfer in Rotating Flows written by Igor V. Shevchuk and published by Springer. This book was released on 2015-07-24 with total page 253 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph presents results of the analytical and numerical modeling of convective heat and mass transfer in different rotating flows caused by (i) system rotation, (ii) swirl flows due to swirl generators, and (iii) surface curvature in turns and bends. Volume forces (i.e. centrifugal and Coriolis forces), which influence the flow pattern, emerge in all of these rotating flows. The main part of this work deals with rotating flows caused by system rotation, which includes several rotating-disk configurations and straight pipes rotating about a parallel axis. Swirl flows are studied in some of the configurations mentioned above. Curvilinear flows are investigated in different geometries of two-pass ribbed and smooth channels with 180° bends. The author demonstrates that the complex phenomena of fluid flow and convective heat transfer in rotating flows can be successfully simulated using not only the universal CFD methodology, but in certain cases by means of the integral methods, self-similar and analytical solutions. The book will be a valuable read for research experts and practitioners in the field of heat and mass transfer.
Download or read book Turbulent Fluid Flow and Heat Transfer Induced by Square ribbed Surface Roughness in Concentric Annuli written by Soo W. Ahn and published by . This book was released on 1990 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present study demonstrates that certain artificial roughness elements may be used to enhance heat transfer rates with advantages from the overall efficiency point of view.
Download or read book Convective Flow and Heat Transfer from Wavy Surfaces written by Aroon Shenoy and published by CRC Press. This book was released on 2016-10-14 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Convective Flow and Heat Transfer from Wavy Surfaces: Viscous Fluids, Porous Media, and Nanofluids addresses the wavy irregular surfaces in heat transfer devices. Fluid flow and heat transfer studies from wavy surfaces have received attention, since they add complexity and require special mathematical techniques. This book considers the flow and heat transfer characteristics from wavy surfaces, providing an understanding of convective behavioral changes.
Download or read book Heat Transfer in Gas Cooled Annular Channels written by Jurgis Vilemas and published by Springer. This book was released on 1987-04-13 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Marangoni Convection in a Gravity free Silicon Float Zone written by Samuel Ohring and published by . This book was released on 1994 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
