Heat transfer foundations

Molems, O., and Schweinzer, J., Prediction of Gas Convective Part of the Heat Transfer to Fluidized Beds, pp. 685-693, Fluidization IV, Eng. Foundation, New York, USA (1989)... 

Ozkaynak, T. F., Chen, J. C., and Frankenfield, T. R., An Experimental Investigation of Radiant Heat Transfer in High Temperature Fluidized Bed, Fluidization, Fourth International Conf. on Fluidization, pp. 371— 378, Engineering Foundation (1983)... 

Xavier, A. M., and Davidson, J. F., Heat Transfer to Surfaces Immersed in Fluidized Beds, Particularly Tube Arrays, Fluidization, Proc. of Second Eng. Foundation Conf., pp. 333-338, Cambridge Univ. Press (1978)... 

Denn, Polymer Melt Processing Foundations in Fluid Mechanics and Heat Transfer Duncan and Reimer, Chemical Engineering Design and Analysis An Introduction Fan and Zhu, Principles of Gas-Solid Flows Fox, Computational Models for Turbulent Reacting Flows... 

Convective heat transfer has become a subject of very wide extent and the selection of material for inclusion in a book of the present type requires careful consideration. In this book, heat transfer during boiling and solidification have not been considered. This is not in any way meant to suggest that these topics are of lesser importance than those included in the book. Rather, it is felt that the student needs a good grounding in the topics covered in the present book before approaching the analysis of heat transfer with boiling and solidification. The book thus lays the foundation for more advanced courses on specialized aspects of convective heat transfer. 

The basic aim of the book is to present a discussion of some currently available methods for predicting convective heat transfer rates. The main emphasis is, therefore, on the prediction of heat transfer rates rather than on the presentation of large amounts of experimental data. Attention is given to both analytical and numerical methods of analysis. Another aim of the book is to present a thorough discussion of the foundations of the subject in a clear, easy to follow, student-oriented style. 

Kandlikar, S.G., (2001), Two-phase flow patterns, pressure drop and heat transfer during boiling in minichannels and microchannels flow passages of compact evaporators. Keynote Lecture presented at the Engineering foundation Conference on Compact Heat Exchangers, Davos, Switzerland, July 1-6. 

Based on the above three models, a dynamic model to scale-up the vacuum pyrolysis process was developed, which correlates the temperature and the mass of feedstock at any position on top of the heating plates inside the reactor, as a function of heat transfer, panicle flow and pyrolysis kinetics phenomena. The energy conservation in the reactor is the foundation of the model. It assumes i) steady flow, ii) one dimensional terr erature variation and, iii) feedstock thermal properties vary as a function of temperature T. 

Fluid mechanics is the foundation of combustion. Mixing, heat transfer, or chemistry all depend on the underlying flow distribution. In turn, they affect the flow pattern. All four processes are intimately linked and interdependent. 

Kutateladze, S. S., Foundations of the Theory of Heat Transfer, Atomizdat, Moscow, 1979 [in Russian],... 

The foundations of an engineering discipline may be best understood by considering the place of that discipline in relation to other engineering disciplines. Therefore, our first concern in this chapter will be to determine the place of heat transfer among engineering disciplines. Next, we shall proceed to a review of the general principles needed for heat transfer. Finally, we shall discuss the three modes of heat transfer— conduction, convection, and radiation—and introduce a five-step methodology for an inductive formulation. 

It is appropriate here to make some remarks on the physical foundations of thermal conductivity. The dependence of thermal conductivity on temperature has been experimentally recognized. However, there is no universal theory explaining this dependence. Gases, liquids, conducting and insulating solids can each be explained with somewhat different microscopic considerations. Although the text is on the continuum aspects of heat transfer, the following remarks are made for some appreciation of the microscopic aspects of thermal conductivity. 

The temperature dependence of thermal conductivity for liquids, metal alloys, and nonconducting solids is more complicated than those mentioned above. Because of these complexities, the temperature dependence of thermal conductivity for a number of materials, as illustrated in Fig. 1,11, does not show a uniform trend. Typical ranges for the thermal conductivity of these materials are given in Table 1.1, We now proceed to a discussion of the foundations of convective and radiative heat transfer. 

So far, we have learned the foundations of heat transfer. We are now ready to proceed to individual problems controlled by conduction, which is the simplest of the... 

Dimensional analysis. In the absence of an analytical solution or analogy between heat and momentum transfer, the (dimensionless) heat transfer coefficient may be obtained from the correlation of experimental data in terms of appropriate dimensionless numbers obtained from a dimensional analysis. In Section 5.3 we shall review the foundations of dimensional analysis in a manner particularly suited to heat transfer studies. 

In Chapter 5, we learned the foundations of convection. Integrating the governing equations for laminar boundary layers, we obtained expressions for the heat transfer associated with forced convection over a horizontal plate and natural convection about a vertical plate. We also found analytically, as well as by the analogy between heat and momentum, that the thermal and momentum characteristics of laminar flow over a flat plate are related by... 

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