Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Simulation Of Fully Developed Creeping Flow Heat Transfer In Tubes With Twisted Tape Inserts
Download Simulation Of Fully Developed Creeping Flow Heat Transfer In Tubes With Twisted Tape Inserts full books in PDF, epub, and Kindle. Read online Simulation Of Fully Developed Creeping Flow Heat Transfer In Tubes With Twisted Tape Inserts ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Simulation of Fully-developed Creeping Flow Heat Transfer in Tubes with Twisted Tape Inserts by : C. E. McCumber
Download or read book Simulation of Fully-developed Creeping Flow Heat Transfer in Tubes with Twisted Tape Inserts written by C. E. McCumber and published by . This book was released on 1983 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Simulation of Fully Developed Laminar Flow and Heat Transfer in Isothermal Helically Twisted Tubes with Elliptical Cross-sections by : Fady Bishara
Download or read book Numerical Simulation of Fully Developed Laminar Flow and Heat Transfer in Isothermal Helically Twisted Tubes with Elliptical Cross-sections written by Fady Bishara and published by . This book was released on 2010 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Periodically fully-developed swirling laminar flows in twisted tubes with elliptical cross sections are numerically simulated. The tubes are helically twisted along the axis perpendicular to their cross-section. The helical twist geometry is described by the 180 degree twist ratio and the elliptical cross-section is described by the ellipse aspect ratio. The geometries considered for this study have twist ratios with values {3,4.5,6} and ellipse aspect ratios with values {0.3, 0.5, 0.7}. Constant-property flow with a nominal Prandtl number of 3 (e.g. water at 60 degree Celsius) and Reynolds numbers in the range 10 The analysis quantifies the improvement in the Nusselt number as well as the increase in friction factor in order to map the effective heat transfer enhancement due to the twisted-tube-geometry-induced swirl flows. To this effect, the numerical results are compared, for a given aspect ratio, with the case of a straight elliptical tube (i.e. twist ratio tends to infinity) for which well established correlations are available. The results were also compared with those of circular tubes with twisted tape inserts for any given twist ratio. Numerical results show that the friction factor and the Nusselt number are strong functions of the twist ratio, aspect ratio and the Reynolds number. The increase in the friction factor and Nusselt number is higher for more tightly twisted tubes and for tubes with a lower ellipse aspect ratio. For Reynolds numbers below 100, the heat transfer results do not deviate significantly from the straight-tube values, but at higher values of Re, significant enhancement in heat transfer is evident for all twist ratios considered here. For example, for tubes with aspect ratio alpha = 0.3 and a twist ratio y = 3, the enhancement of the Nusselt number relative to the straight tube Nusselt number Nu/Nu(y=infinity) = 2.7. For the same aspect ratio, but with a twist ratio $y=6$, the enhancement Nu/Nu(y=infinity) = 2. On the other hand, for nearly round cross sections (e.g. alpha = 0.7) and nearly straight tubes (e.g. y=6) the enhancement Nu/Nu(y=infinity) ~ 1; i.e. there is no enhancement. The friction factor and Nusselt number results provided in this paper will give practicing engineers the necessary data to integrate twisted elliptical tubes in various heat transfer applications.
Book Synopsis Computational Modeling of Laminar Swirl Flows and Heat Transfer in Circular Tubes with Twisted-tape Inserts by :
Download or read book Computational Modeling of Laminar Swirl Flows and Heat Transfer in Circular Tubes with Twisted-tape Inserts written by and published by . This book was released on 2002 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A numerical study is carried out to predict the velocity and temperature distributions in fully developed, constant property, laminar flows in tubes containing twisted-tape inserts. The tape inserts are characterized by the twist ratio y (ratio of 180ʻ twist pitch of the tape H to the tube inner diameter d), and the ratio of tape thickness d to the tube diameter, d / d . The swirl flow is simulated by following the helically twisted flow path in the partitioned tube represented by a semi-circular cross-section geometry. In this model, the tape thickness is neglected (d = 0), which is a reasonable first-order approximation as d / d? [10 -2] for most inserts used in practice. For the numerical solution of the velocity problem, the stream function and vorticity formulation is employed. The corresponding non-linear governing differential equations for the stream function, vorticity, axial velocity and temperature distributions are discretized using the finite control-volume method. This procedure essentially retains the conservative forms of the governing equations, and provides second-order discretization accuracy for the numerical solution. For the heat transfer problem both the uniform wall temperature (UWT) and uniform heat flux (UHF) boundary conditions at the tube wall are considered. In addition, two variations of the tape surface condition are considered, namely, uniform temperature and zero heat flux. These two cases model the tape as having infinite and zero fin efficiency, respectively. Results for the variations in the velocity and temperature fields with flow Reynolds number Re and tape twist ratio y are presented; the temperature distributions also reflects the influence of fluid Prandtl number Pr. The twisted-tape induced swirl flow field is characterized by a single longitudinal vortex that breaks up into two counter-rotating helical vortices with increasing Re or decreasing y . Correspondingly, both the friction factor f and Nusselt number Nu increase substantially; in the case of heat transfer, Nusselt number also increases with Pr. The results for f and Nu are found to agree very well with the respective Manglik and Bergles (1993) correlations. This verifies the scaling of swirl flow effects by the parameter Sw as proposed by them.
Book Synopsis Nachträge zu Band 3 und Band 4 (Acanthaceae bis Lythraceae). by :
Download or read book Nachträge zu Band 3 und Band 4 (Acanthaceae bis Lythraceae). written by and published by . This book was released on 1989 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Investigation of Heat Transfer and Fluid Flow in Tubes Induced with Twisted Tape Inserts by : Taiwo Oluwasesan Oni
Download or read book Numerical Investigation of Heat Transfer and Fluid Flow in Tubes Induced with Twisted Tape Inserts written by Taiwo Oluwasesan Oni and published by . This book was released on 2015 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Twisted Tape Width on Heat Transfer and Pressure Drop for Fully Developed Laminar Flow by : Walid M. Chakroun
Download or read book Effect of Twisted Tape Width on Heat Transfer and Pressure Drop for Fully Developed Laminar Flow written by Walid M. Chakroun and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presented at the International Gas Turbine and Aeroengine Congress & Exposition, Houston, Texas - June 5-8, 1995.
Book Synopsis Turbulent Flow and Heat Transfer in Tubes Under Slip Flow Conditions by : Wolodymyr J. Minkowycz
Download or read book Turbulent Flow and Heat Transfer in Tubes Under Slip Flow Conditions written by Wolodymyr J. Minkowycz and published by . This book was released on 1961 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Finite Element Methods and Navier-Stokes Equations by : C. Cuvelier
Download or read book Finite Element Methods and Navier-Stokes Equations written by C. Cuvelier and published by Springer Science & Business Media. This book was released on 1986-03-31 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heat Transfer in Tube Banks in Crossflow by : Alʹgirdas Alʹfonsovich Zhukauskas
Download or read book Heat Transfer in Tube Banks in Crossflow written by Alʹgirdas Alʹfonsovich Zhukauskas and published by CRC Press. This book was released on 1988 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1992 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Numerical Prediction of Flow, Heat Transfer, Turbulence, and Combustion by : Dudley Brian Spalding
Download or read book Numerical Prediction of Flow, Heat Transfer, Turbulence, and Combustion written by Dudley Brian Spalding and published by Pergamon. This book was released on 1983 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1996 with total page 1012 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fully Developed Forced Convection Heat Transfer and Pressure Drop in a Smooth Tube in the Transitional Flow Regime by : Nicola Mary Van der Merwe
Download or read book Fully Developed Forced Convection Heat Transfer and Pressure Drop in a Smooth Tube in the Transitional Flow Regime written by Nicola Mary Van der Merwe and published by . This book was released on 2017 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: Extensive work has been done on characterising convective heat transfer and pressure drop in smooth tubes in the laminar and turbulent flow regimes. However, little work was completed in the transitional flow regime. In all previous transitional studies, experiments that were conducted between the laminar and turbulent flow regimes were with mixed convection in the laminar flow regime and not in the forced convection flow regime. The secondary flow that occurs during mixed convection should most probably influence the characteristics in the transitional flow regime. It can therefore be expected that the transitional flow characteristics of forced convection and mixed convection will be different. However, the transitional characteristics of forced convection flow have not yet been determined. The purpose of this study was therefore to determine the heat transfer and pressure drop transitional characteristics specifically in the forced convection flow regime. Furthermore, to focus on determining these factors for a circular, horizontal smooth tube for fully developed flow. The characteristics were determined in an experimental set-up through which flow occurred through a test section consisting of a horizontal and circular smooth tube. The test-section inside diameter was 4.04 mm, and the tube length was 8.4 m. Water was used as the test fluid and was circulated through the test section which was heated at a constant heat flux. A calming section with a square edge inlet was upstream of the test section. Temperatures at the tube inlet, outlet and outer surface of the test section were measured with a total of 58 thermocouples. Two pressure taps was also installed on the test section and was connected to a pressure transducer for pressure drop measurements. Experiments were conducted mainly on the last part of the test section where fully developed flow occurred. Experiments were conducted between Reynolds numbers of 1 000 to 10 000, Prandtl numbers of 3 to 8, and Rayleigh numbers of 330 and 11 000 (heat fluxes of 0.89 kW/m2 to 3.26 kW/m2). It was found that the heat transfer transitional range coincided with the friction factor transition range with a Reynolds number range of 2 484 to 2 849. Forced convection results in the laminar regime was achieved and compared well to literature. The results were mapped on published flow regime maps. This was inconclusive as the published flow regime maps have been specifically developed for fixed parameters that did not match the parameters of this study..
Book Synopsis Applied Science & Technology Index by :
Download or read book Applied Science & Technology Index written by and published by . This book was released on 1997 with total page 2948 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Theoretical Chemical Engineering Abstracts by :
Download or read book Theoretical Chemical Engineering Abstracts written by and published by . This book was released on 1980 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Introduction to Convective Heat Transfer Analysis by : P. H. Oosthuizen
Download or read book An Introduction to Convective Heat Transfer Analysis written by P. H. Oosthuizen and published by McGraw-Hill Science, Engineering & Mathematics. This book was released on 1999 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: A student-oriented approach in which basic ideas and assumptions are stressed and discussed in detail and full developments of all important analyses are provided. The book contains many worked examples that illustrate the methods of analysis discussed. The book also contains a comprehensive set of problems and a Solutions Manual, written by the text authors.
Book Synopsis Heat Transfer Enhancement with Nanofluids by : Vincenzo Bianco
Download or read book Heat Transfer Enhancement with Nanofluids written by Vincenzo Bianco and published by CRC Press. This book was released on 2015-04-01 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nanofluids are gaining the attention of scientists and researchers around the world. This new category of heat transfer medium improves the thermal conductivity of fluid by suspending small solid particles within it and offers the possibility of increased heat transfer in a variety of applications. Bringing together expert contributions from
