Numerical Investigation Of One Dimensional Heat Flux Calculations
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Numerical Investigation Of One Dimensional Heat Flux Calculations
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Author :
language : en
Publisher:
Release Date : 1994
Numerical Investigation Of One Dimensional Heat Flux Calculations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.
New computer codes to determine the heat transfer rate from wind tunnel model surface temperature measurements have been developed for use in the Navy's Hypervelocity Wind Tunnel No. 9 (Tunnel 9). The existing code, which assumes one-dimensional (1D) conduction in a Cartesian coordinate system, accurately predicts lD heat-flux when applied to flat or nearly flat geometries. Heating rates are overpredicted when the code is applied to cylindrical, spherical, and conical geometries. The over-prediction increases with larger test times and smaller radius of curvature. Heating rates are also over- predicted when the code is applied under a two-dimensional (2D) heating load that varies linearly in space. This over-prediction increases with larger test times and larger spatial gradient of heat-flux but is small for typical Tunnel 9 applications. Two new computer codes, which assume 1D conduction in cylindrical and spherical coordinates, accurately predict 1D heat-flux applied to cylindrical, spherical, and conical geometries. These two codes are online for use as a tool in evaluating heat transfer from Tunnel 9 data.
A Numerical Investigation Of Thin Film Heat Transfer Gages
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Author : Joseph A. Bonafede
language : en
Publisher:
Release Date : 1989
A Numerical Investigation Of Thin Film Heat Transfer Gages written by Joseph A. Bonafede and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
When using a thin film gage to measure surface heat flux, one typically reduces the data for surface temperature to surface heat flux using a series solution for one-dimensional heat transfer in an initially isothermal, semi-infinite solid. However, the gage may not behave as an initially isothermal, semi-infinite solid due to multidimensional heat transfer and electrical preheating of the gage when the instrumentation is turned on. To evaluate the accuracy of the series solution for use with thin-film gages, the heat transfer in a gage was numerically simulated using a two-dimensional, finite-difference model. The actual geometry of the probe was simplified to reduce the heat transfer to two dimensions. The simulation produced surface temperatures which were used in the series solution to find estimates of surface heat flux. The heat fluxes from the simulation and the series solution were then compared to evaluate the accuracy of the series solution. The analysis provides good insight into the causes of inaccuracies when using the series solution. It also provides some quantitative results which may be helpful for estimating errors in actual laboratory use. Theses. (mjm).
The Finite Element Method In Heat Transfer Analysis
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Author : Roland W. Lewis
language : en
Publisher: John Wiley & Sons
Release Date : 1996-08-06
The Finite Element Method In Heat Transfer Analysis written by Roland W. Lewis and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996-08-06 with Science categories.
Heat transfer analysis is a problem of major significance in a vast range of industrial applications. These extend over the fields of mechanical engineering, aeronautical engineering, chemical engineering and numerous applications in civil and electrical engineering. If one considers the heat conduction equation alone the number of practical problems amenable to solution is extensive. Expansion of the work to include features such as phase change, coupled heat and mass transfer, and thermal stress analysis provides the engineer with the capability to address a further series of key engineering problems. The complexity of practical problems is such that closed form solutions are not generally possible. The use of numerical techniques to solve such problems is therefore considered essential, and this book presents the use of the powerful finite element method in heat transfer analysis. Starting with the fundamental general heat conduction equation, the book moves on to consider the solution of linear steady state heat conduction problems, transient analyses and non-linear examples. Problems of melting and solidification are then considered at length followed by a chapter on convection. The application of heat and mass transfer to drying problems and the calculation of both thermal and shrinkage stresses conclude the book. Numerical examples are used to illustrate the basic concepts introduced. This book is the outcome of the teaching and research experience of the authors over a period of more than 20 years.
Numerical Methods In Heat Transfer
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Author : Roland W. Lewis
language : en
Publisher:
Release Date : 1983-08-24
Numerical Methods In Heat Transfer written by Roland W. Lewis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983-08-24 with Mathematics categories.
Fundamentals Of The Finite Element Method For Heat And Fluid Flow
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Author : Roland W. Lewis
language : en
Publisher: John Wiley and Sons
Release Date : 2008-02-07
Fundamentals Of The Finite Element Method For Heat And Fluid Flow written by Roland W. Lewis and has been published by John Wiley and Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008-02-07 with Science categories.
Heat transfer is the area of engineering science which describes the energy transport between material bodies due to a difference in temperature. The three different modes of heat transport are conduction, convection and radiation. In most problems, these three modes exist simultaneously. However, the significance of these modes depends on the problems studied and often, insignificant modes are neglected. Very often books published on Computational Fluid Dynamics using the Finite Element Method give very little or no significance to thermal or heat transfer problems. From the research point of view, it is important to explain the handling of various types of heat transfer problems with different types of complex boundary conditions. Problems with slow fluid motion and heat transfer can be difficult problems to handle. Therefore, the complexity of combined fluid flow and heat transfer problems should not be underestimated and should be dealt with carefully. This book: Is ideal for teaching senior undergraduates the fundamentals of how to use the Finite Element Method to solve heat transfer and fluid dynamics problems Explains how to solve various heat transfer problems with different types of boundary conditions Uses recent computational methods and codes to handle complex fluid motion and heat transfer problems Includes a large number of examples and exercises on heat transfer problems In an era of parallel computing, computational efficiency and easy to handle codes play a major part. Bearing all these points in mind, the topics covered on combined flow and heat transfer in this book will be an asset for practising engineers and postgraduate students. Other topics of interest for the heat transfer community, such as heat exchangers and radiation heat transfer, are also included.
Elementary Heat Transfer Analysis
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Author : Stephen Whitaker
language : en
Publisher: Elsevier
Release Date : 2014-05-18
Elementary Heat Transfer Analysis written by Stephen Whitaker and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-05-18 with Science categories.
Elementary Heat Transfer Analysis provides information pertinent to the fundamental aspects of the nature of transient heat conduction. This book presents a thorough understanding of the thermal energy equation and its application to boundary layer flows and confined and unconfined turbulent flows. Organized into nine chapters, this book begins with an overview of the use of heat transfer coefficients in formulating the flux condition at phase interface. This text then explains the specification as well as application of flux boundary conditions. Other chapters consider a derivation of the transient heat conduction equation. This book discusses as well the convective energy transport based on the understanding and application of the thermal energy equation. The final chapter deals with the study of the processes of heat transfer during boiling and condensation. This book is a valuable resource for Junior or Senior engineering students who are in an introductory course in heat transfer.
Future Space Transport System Components Under High Thermal And Mechanical Loads
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Author : Nikolaus A. Adams
language : en
Publisher: Springer Nature
Release Date : 2020-10-26
Future Space Transport System Components Under High Thermal And Mechanical Loads written by Nikolaus A. Adams and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-10-26 with Technology & Engineering categories.
This open access book presents the findings of Collaborative Research Center Transregio 40 (TRR40), initiated in July 2008 and funded by the German Research Foundation (DFG). Gathering innovative design concepts for thrust chambers and nozzles, as well as cutting-edge methods of aft-body flow control and propulsion-component cooling, it brings together fundamental research undertaken at universities, testing carried out at the German Aerospace Center (DLR) and industrial developments from the ArianeGroup. With a particular focus on heat transfer analyses and novel cooling concepts for thermally highly loaded structures, the book highlights the aft-body flow of the space transportation system and its interaction with the nozzle flow, which are especially critical during the early phase of atmospheric ascent. Moreover, it describes virtual demonstrators for combustion chambers and nozzles, and discusses their industrial applicability. As such, it is a timely resource for researchers, graduate students and practitioners.
Heat Conduction
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Author : Renato M. Cotta
language : en
Publisher:
Release Date : 1997-06-17
Heat Conduction written by Renato M. Cotta and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-06-17 with Science categories.
In this rigorous and thorough analysis three concepts of heat conduction are studied: improved lumped-differential formulations, the generalized integral transform technique, and symbolic computation. Addressing problem formulation, solution methodology and computational implementation, the authors develop an improved lumped-differential formulation for heat conduction problems, present a unified hybrid numerical?analytical solution methodology for linear and nonlinear problems, and provide an introduction to mixed symbolic?numerical computation. Special topics and applications illustrate the theory, including extended surfaces, drying, ablation, conjugated problems and anisotropic media. Sample computer programs, using mixed symbolic?numerical computation, are presented in notebook format, developed within the Mathematica system.
Numerical Thermal Analysis
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Author : Satish P. Ketkar
language : en
Publisher: American Society of Mechanical Engineers
Release Date : 1999
Numerical Thermal Analysis written by Satish P. Ketkar and has been published by American Society of Mechanical Engineers this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999 with Mathematics categories.
This reference for engineers who use computerized thermal analysis tools covers the basics of finite difference, finite element, and control volume methods. The author also presents a hybrid method that combines features of finite element modeling with the computational efficiency of finite difference network solution techniques. Annotation copyrighted by Book News, Inc., Portland, OR
An Implicit Numerical Method For Solving The Two Dimensional Heat Equation
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Author : George A. Baker
language : en
Publisher:
Release Date : 1958
An Implicit Numerical Method For Solving The Two Dimensional Heat Equation written by George A. Baker and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Heat equation categories.