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Heat transfer handbook
01 Jan 2003-
TL;DR: In this paper, the authors introduce basic concepts of heat transfer, including thermal spreading and contact resistances, and forced convection and external flow. But they do not consider the effect of external flow on internal flow.
Abstract: Preface. Contributors. 1. Basic Concepts (Allan D. Kraus). 2. Thermophysical Properties of Fluids and Materials (R. T Jacobsen, E. W. Lemmon, S. G. Penoncello, Z. Shan, and N. T. Wright). 3. Conduction Heat Transfer (A. Aziz). 4. Thermal Spreading and Contact Resistances (M. M. Yovanovich and E. E. Marotta). 5. Forced Convection: Internal Flows (Adrian Bejan). 6. Forced Convection: External Flows (Yogendra Joshi and Wataru Nakayama). 7. Natural Convection (Yogesh Jaluria). 8. Thermal Radiation (Michael F. Modest). 9. Boiling (John R. Thome). 10. Condensation (M. A. Kedzierski, J. C. Chato, and T. J. Rabas). 11. Heat Exchangers (Allan D. Kraus). 12. Experimental Methods (Jose L. Lage). 13. Heat Transfer in Electronic Equipment (Avram Bar-Cohen, Abhay A. Watwe, and Ravi S. Prasher). 14. Heat Transfer Enhancement (R. M. Manglik). 15. Porous Media (Adrian Bejan). 16. Heat Pipes (Jay M. Ochterbeck). 17. Heat Transfer in Manufacturing and Materials Processing (Richard N. Smith, C. Haris Doumanidis, and Ranga Pitchumani). 18. Microscale Heat Transfer (Andrew N. Smith and Pamela M. Norris). 19. Direct Contact Heat Transfer (Robert F. Boehm). Author Index. Subject Index. About the CD-ROM.
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TL;DR: In this article, the ability to achieve a simultaneous increase in the power factor and a decrease in the thermal conductivity of the same nanocomposite sample and for transport in the same direction is discussed.
Abstract: Many of the recent advances in enhancing the thermoelectric figure of merit are linked to nanoscale phenomena found both in bulk samples containing nanoscale constituents and in nanoscale samples themselves. Prior theoretical and experimental proof-of-principle studies on quantum-well superlattice and quantum-wire samples have now evolved into studies on bulk samples containing nanostructured constituents prepared by chemical or physical approaches. In this Review, nanostructural composites are shown to exhibit nanostructures and properties that show promise for thermoelectric applications, thus bringing together low-dimensional and bulk materials for thermoelectric applications. Particular emphasis is given in this Review to the ability to achieve 1) a simultaneous increase in the power factor and a decrease in the thermal conductivity in the same nanocomposite sample and for transport in the same direction and 2) lower values of the thermal conductivity in these nanocomposites as compared to alloy samples of the same chemical composition. The outlook for future research directions for nanocomposite thermoelectric materials is also discussed.
3,562 citations
TL;DR: A colloidal mixture of nano-sized particles in a base fluid, called nanofluids, tremendously enhances the heat transfer characteristics of the original fluid, and is ideally suited for practical applications due to its marvelous characteristics.
Abstract: A colloidal mixture of nano-sized particles in a base fluid, called nanofluids, tremendously enhances the heat transfer characteristics of the original fluid, and is ideally suited for practical applications due to its marvelous characteristics. This article addresses the unique features of nanofluids, such as enhancement of heat transfer, improvement in thermal conductivity, increase in surface volume ratio, Brownian motion, thermophoresis, etc. In addition, the article summarizes the recent research in experimental and theoretical studies on forced and free convective heat transfer in nanofluids, their thermo-physical properties and their applications, and identifies the challenges and opportunities for future research.
713 citations
TL;DR: In this paper, the effect of Al2O3-water nanofluid, as working fluid, on the efficiency of a flat-plate solar collector was investigated experimentally.
618 citations
TL;DR: In this paper, the authors used an innovative simulation technique known as element birth and death, in modelling the three-dimensional temperature field in multiple layers in a powder bed, which indicated that the heated regions undergo rapid thermal cycles that could be associated with commensurate thermal stress cycles.
Abstract: Simulating the transient temperature field in additive layer manufacturing (ALM) processes has presented a challenge to many researchers in the field. The transient temperature history is vital for determining the thermal stress distribution and residual stress states in ALM-processed parts that utilise a moving laser heat source. The modelling of the problem involving multiple layers is equally of great importance because the thermal interactions of successive layers affect the temperature gradients, which govern the heat transfer and thermal stress development mechanisms. This paper uses an innovative simulation technique known as element birth and death, in modelling the three-dimensional temperature field in multiple layers in a powder bed. The results indicate that the heated regions undergo rapid thermal cycles that could be associated with commensurate thermal stress cycles. Deposition of successive layers and subsequent laser scanning produces temperature spikes in previous layers. The resultant effect is a steady temperature build-up in the lower layers as the number of layers increases.
583 citations
TL;DR: In this paper, the effect of particle size on convective heat transfer in laminar developing region was evaluated with alumina-water nanofluids in tube flow with constant heat flux.
528 citations