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Thermal Entrance Region Heat Transfer For Rectangular Ducts Of Various Aspect Ratios And Peclet Numbers
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Book Synopsis Thermal Entrance Region Heat Transfer for Rectangular Ducts of Various Aspect Ratios and Peclet Numbers by : Jack Richard DeWitt
Download or read book Thermal Entrance Region Heat Transfer for Rectangular Ducts of Various Aspect Ratios and Peclet Numbers written by Jack Richard DeWitt and published by . This book was released on 1968 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this investigation the thermal entrance region problem is solved for flow in rectangular ducts of various aspect ratios and for various Peclet numbers. The assumptions under which the problem is solved are steady, fully developed laminar velocity profile, constant fluid properties of viscosity, density, specific heat and thermal conductivity, constant wall temperature, and a uniform inlet fluid temperature. Included in the solution are axial conduction and viscous dissipation. The method of B.G. Galerkin is used to formulate an approximate series solution of the problem. The data presented include bulk mean temperature, local Nusselt number, and the ratio of the local heat-transfer rate to the long wall to the local heat-transfer rate to the short wall. It is concluded that for low Peclet numbers, neglecting the axial conduction term leads to considerable error in the solution. (Author).
Book Synopsis Laminar Flow Forced Convection in Ducts by : R. K. Shah
Download or read book Laminar Flow Forced Convection in Ducts written by R. K. Shah and published by Academic Press. This book was released on 2014-06-28 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laminar Flow Forced Convection in Ducts is a sourcebook for compact heat exchanger analytical data. This book describes the analytical solutions for laminar fluid flow and forced convection heat transfer in circular and noncircular pipes, including applicable differential equations and boundary conditions involving velocity and temperature problems of fluid flow. The book also discusses fluid flow—how much power is required to pump fluids through the heat exchanger, as well as the heat transfer—the determination of q" distribution, and the temperature of fluid and walls. The text also analyzes the coolant or heat transfer fluid flows in a nuclear power reactor composed of a bundle of circular section fuel rods located inside a round tube. R.A. Axford addresses fluid flow and heat transfers results for the rod bundle geometry in "Heat Transfer in Rod Bundles." The book also provides an overview and guidelines that can be used for the designer and the applied mathematician. This book is suitable for engineers working in electronics, aerospace, instrumentation, and biomechanics that use cooling or heating exchanges or solar collection systems.
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1970 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Microscale and Nanoscale Heat Transfer by : Mourad Rebay
Download or read book Microscale and Nanoscale Heat Transfer written by Mourad Rebay and published by CRC Press. This book was released on 2016-01-06 with total page 499 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microscale and Nanoscale Heat Transfer: Analysis, Design, and Applications features contributions from prominent researchers in the field of micro- and nanoscale heat transfer and associated technologies and offers a complete understanding of thermal transport in nano-materials and devices. Nanofluids can be used as working fluids in thermal system
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1967 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Heat Transfer to a Fully Developed Laminar Flow in the Thermal Entrance Region of Rectangular Ducts by : William Nichols Latham
Download or read book Heat Transfer to a Fully Developed Laminar Flow in the Thermal Entrance Region of Rectangular Ducts written by William Nichols Latham and published by . This book was released on 1960 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Convective Heat Transfer in Ducts: The Integral Transform Approach by : C.A.C.. Santos
Download or read book Convective Heat Transfer in Ducts: The Integral Transform Approach written by C.A.C.. Santos and published by Editora E-papers. This book was released on 2001 with total page 345 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Turbulent Forced Convective Heat Transfer in Asymmetrically Heated Rectangular Ducts of Various Aspect Ratios by : E. Lincke
Download or read book Turbulent Forced Convective Heat Transfer in Asymmetrically Heated Rectangular Ducts of Various Aspect Ratios written by E. Lincke and published by . This book was released on 1970 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Masters Theses and Doctoral Dissertations in the Pure and Applied Sciences Accepted by Colleges and Universities of the United States by :
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:
Book Synopsis Measurement of Heat-transfer and Friction Coefficients for Flow of Air in Noncircular Ducts at High Surface Temperatures by : Warren H. Lowdermilk
Download or read book Measurement of Heat-transfer and Friction Coefficients for Flow of Air in Noncircular Ducts at High Surface Temperatures written by Warren H. Lowdermilk and published by . This book was released on 1954 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Measurements of average heat-transfer and friction coefficients were obtained with air flowing through electrically heated ducts having square, rectangular (aspect ratio, 5), and triangular cross sections for a range of surface temperature from 540° to 1780° R and Reynolds number from 1000 to 330,000. The results indicated that the effect of heat flux on correlations of the average heat-transfer and friction coefficients is similar to that obtained for circular tubes in a previous investigation and was nearly eliminated by evaluating the physical properties and density of the air at a film temperature halfway between the average surface and fluid bulk temperatures. With the Nusselt and Reynolds numbers based on the hydraulic diameter of the ducts, the data for the noncircular ducts could be represented by the same equations obtained in the previous investigation for circular tubes. Correlation of the average difference between the surface corner and midwall temperatures for the square duct was in agreement with predicted values from a previous analysis. However, for the rectangular and triangular ducts, the measured corner temperature was greater by approximately 20 and 35 percent, respectively, than the values predicted by analysis.
Download or read book Heat Bibliography written by and published by . This book was released on 1970 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Laminar Forced-convection Heat Transfer in Entrance Region of Flat Rectangular Ducts by : E. M. Sparrow
Download or read book Analysis of Laminar Forced-convection Heat Transfer in Entrance Region of Flat Rectangular Ducts written by E. M. Sparrow and published by . This book was released on 1955 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calculations were alao made for a duct having one wall at uniform temperature and the other wall insulated. Nusselt numbers are reported for the range of Prandtl numbers from 0.01 to 50.
Download or read book NASA SP. written by and published by . This book was released on 1970 with total page 1166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Finite Difference Analysis of Forcedconvection Heat Transfer in Entrance Region of a Flat Rectangular Duct by : Ching-Lai Hwang
Download or read book Finite Difference Analysis of Forcedconvection Heat Transfer in Entrance Region of a Flat Rectangular Duct written by Ching-Lai Hwang and published by . This book was released on 1963 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: The laminar forced convection heat transfer in the entrance region of a flat rectangular duct is studied. In this region temperature and velocity profiles are simultaneously developed. The basic governing equations of momentum, continuity, and energy are expressed in finite difference form and solved numerically by use of a high speed computer for a mesh network superimposed on the flow field. All fluid properties are assumed to be constant. The cases of uniform constant wall temperature and of uniform constant heat flux from wall to fluid are considered. Nusselt numbers are reported for Prandtl numbers in the range of 0.01 to 50. The exact solution of the energy equation obtained by means of the numerical method is compared with the results of approximate solutions. (Author).
Book Synopsis U.S. Government Research & Development Reports by :
Download or read book U.S. Government Research & Development Reports written by and published by . This book was released on 1969 with total page 1304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Forced Convection in Curved Ducts by : Fang Liu
Download or read book Forced Convection in Curved Ducts written by Fang Liu and published by . This book was released on 2017-01-27 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Forced Convection in Curved Ducts: Multiplicity and Stability" by Fang, Liu, 劉方, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled FORCED CONVECTION IN CURVED DUCTS: MULTIPLICITY AND STABILITY Submitted by Fang LIU for the degree of Doctor of philosophy at the University of Hong Kong in October 2006 Numerical studies are made on fully developed forced convection in slightly / tightly curved ducts of square / rectangular cross-sections, which are encountered in wide applications. The investigation is confined to fully developed flow and heat transfer under peripherally uniform wall temperature. Thermo-physical properties of fluid are taken as the constants. The study focuses on flow bifurcation and stability in curved ducts with different curvature ratios and aspect ratios: slightly curved square ducts, tightly curved square ducts and tightly curved rectangular ducts. Steady bifurcation structures in these curved ducts are obtained. The physical mechanisms and driving forces of the flow structures are discussed. The stability on various branches is determined by direct transient computation on dynamic responses of the multiple solutions. The characteristics of the flow oscillations are revealed by Hilbert spectral analysis. The investigation is divided into three parts according to the curvature ratio and aspect ratio of the curved ducts. In the first part, bifurcation and stability of forced convection in a slightly curved square duct are studied. Six known solution branches are extended to the high Dean number region and four new asymmetric branches are found. As the Dean number increases, fully-developed flows evolve from a stable steady 2-cell solution to a periodic oscillation, another stable steady solution, an intermittent oscillation and a chaotic oscillation. In the second part, bifurcation and stability of forced convection in a tightly curved square duct are studied. Ten solution branches are found, including five asymmetric branches and some sub-branches of the known branches that are new for tightly curved ducts. As the Dean number increases, finite random disturbances lead the flows from a stable steady state to the co-existence of two kinds of periodic oscillations, the co-existence of several kinds of intermittent oscillations, and a chaotic oscillation. In the third part, bifurcation and stability of forced convection in a tightly curved rectangular duct of aspect ratio 10 are investigated. Eleven solution branches are found, seven symmetric and four asymmetric. Ekman vortices are considerably long due to large aspect ratio. As the Dean number increases, finite random disturbances lead the flows from a stable steady state to another stable steady state, a periodic oscillation, an intermittent oscillation, another periodic oscillation and a chaotic oscillation. The mean friction factor and the mean Nusselt number are obtained for all physically-realizable fully-developed flows in these curved ducts. A significant enhancement of heat transfer can be obtained at the expense of a slight increase of flow friction. DOI: 10.5353/th_b3701583 Subjects: Tubes - Fluid dynamics Heat - Convection Bifurcation theory
Book Synopsis Journal of Thermophysics and Heat Transfer by :
Download or read book Journal of Thermophysics and Heat Transfer written by and published by . This book was released on 2004 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. It publishes papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include conductive, convective, and radiative modes alone or in combination and the effects of the environment.
