Experimental Study of Natural Convection in a Horizontal Annulus with a Saturated Porous Medium PDF Download
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Author: Ronald A. Baunchalk
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 138
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Book Description
Author: Ronald A. Baunchalk
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 138
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Book Description
Author: D.A. Nield
Publisher: Springer Science & Business Media
ISBN: 0387334319
Category : Technology & Engineering
Languages : en
Pages : 655
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Book Description
This new edition includes nearly 1000 new references.
Author: Gregory Herbert Evans
Publisher:
ISBN:
Category : Heat
Languages : en
Pages : 112
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The natural convective heat transfer across an annulus with irregular boundaries was studied using a Mach-Zehnder interferometer. The annulus was formed by an inner hexagonal cylinder and an outer concentric circular cylinder. This configuration models, in two dimensions, a liquid metal fast breeder reactor spent fuel subassembly inside a shipping container. During the test, the annulus was filled with a single gas, either neon, air, argon, krypton, or xenon, at a pressure of about 0.5 MPa. From temperature measurements, both local and mean Nusselt numbers (Nu/sub .delta./) at the surface of the inner cylinder were evaluated, with the mean Rayleigh number (anti Ra/sub .delta./) varying from 4.54 x 104 to 0.915 x 106 (.delta. is the local gas width). The data correlation for the mean Nusselt and Rayleigh numbers is given by anti Nu/sub .delta./ = 0.183 anti Ra/sub .delta./° 31°.
Author: Kambiz Vafai
Publisher: CRC Press
ISBN: 0415876389
Category : Science
Languages : en
Pages : 771
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Book Description
Over the last three decades, advances in modeling flow, heat, and mass transfer through a porous medium have dramatically transformed engineering applications. Comprehensive and cohesive, Handbook of Porous Media, Second Edition presents a compilation of research related to heat and mass transfer including the development of practical applications
Author: F. C. Lai
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: D.A. Nield
Publisher: Springer Science & Business Media
ISBN: 1475730330
Category : Technology & Engineering
Languages : en
Pages : 546
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Book Description
A user-friendly introduction to convection in porous media, such as fibrous insulation, geological strata, and catalytic reactors. This is a self-contained presentation, requiring only routine classical mathematics and the basic elements of fluid mechanics and heat transfer. It will thus be of use not only to researchers and practising engineers as a review and reference, but also to graduates and others just entering the field. Applications discussed include such disparate topics as building insulation, energy storage, nuclear-waste disposal, coal and grain storage, chemical reactor engineering, groundwater flow, and stability of snow to avalanches. In this second edition the authors have added: discussions of compact heat exchangers and of tree networks; new material on external natural convection; descriptions of the effects of magnetic fields, of rotations, and of periodic heating; discussions of inclined gradients and of the solidification of alloys; and an extensive treatment of two-phase flows. An extensive list of references -- emphasising recent experimental work -- provides access to the current research literature.
Author:
Publisher:
ISBN:
Category : Mechanics, Applied
Languages : en
Pages : 400
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Book Description
Author: Donald A. Nield
Publisher: Springer Science & Business Media
ISBN: 1461455413
Category : Science
Languages : en
Pages : 778
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Book Description
Convection in Porous Media, 4th Edition, provides a user-friendly introduction to the subject, covering a wide range of topics, such as fibrous insulation, geological strata, and catalytic reactors. The presentation is self-contained, requiring only routine mathematics and the basic elements of fluid mechanics and heat transfer. The book will be of use not only to researchers and practicing engineers as a review and reference, but also to graduate students and others entering the field. The new edition features approximately 1,750 new references and covers current research in nanofluids, cellular porous materials, strong heterogeneity, pulsating flow, and more.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
An experimental effort is presently underway to investigate natural convection phenomena in liquid-saturated porous media utilizing a geometry, and hydrodynamic/thermal boundary conditions, relevant to the problem of nuclear-waste isolation in geologic repositories. During the first phase of this research program, detailed measurements were made of the steady-state thermal field throughout an annular test region bounded by a vertical, constant-heat-flux, inner cylinder and a concentrically-placed, constant-temperature, outer cylinder. An overlying, constant-pressure, fluid layer was utilized to supply a permeable upper surface boundary condition. Results showed the heater surface temperature to increase with increasing vertical distance due to the presence of a buoyantly-driven upflow. The measured temperature difference (.delta.T) between the average heater surface temperature and the constant, outer-surface, temperature was found to be progressively below the straight-line/conduction-only solution for .delta.T vs power input as the latter was systematically increased. Comparisons between measured results and numerical predictions generated with the finite-element code MARIAH showed very good agreement, thereby contributing to the qualification of this code for repository-design applications.
