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Thermal conductivity measurements of pacific illite sediment (1986)

Hickox, C. E. ; McVey, D. F. ; Miller, J. B. ; [et al.]

Springer

International journal of thermophysics 7 (1986), S. 755-764

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ISSN: 1572-9567

Keywords: illite ; line-source probe ; sediment ; thermal conductivity

Source: Springer Online Journal Archives 1860-2000

Topics: Physics

Notes: Abstract Results are reported for effective thermal conductivity measurements performed in situ and in core samples of illite marine sediment. The measurements were obtained during a recent oceanographic expedition to a study site in the north central region of the Pacific Ocean. This study was undertaken in support of the U.S. Subseabed Disposal Project, the purpose of which is to investigate the scientific feasibility of using the fine-grained sediments of the sea floor as a repository for high-level nuclear waste. In situ measurements were made and 1.5-m-long hydrostatic piston cores were taken, under remote control, from a platform that was lowered to the sea floor, 5844 m below sea level. The in situ measurement of thermal conductivity was made at a nominal depth of 80 cm below the sediment surface using a specially developed, line-source, needle probe. Thermal conductivity measurements in three piston cores and one box core (obtained several kilometers from the study site) were made on shipboard using a miniature needle probe. The in situ thermal conductivity was approximately 0.91 W · m−1 · K−1. Values determined from the cores were within the range 0.81 to 0.89 W · m−1 · K−1.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00503833

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A numerical study of the applicability of the Boussinesq approximation for a fluid-saturated porous medium (1985)

Gartling, D. K. ; Hickox, C. E.

Chichester : Wiley-Blackwell

International Journal for Numerical Methods in Fluids 5 (1985), S. 995-1013

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ISSN: 0271-2091

Keywords: Boussinesq Approximation ; Porous Media ; Finite Element ; Engineering ; Engineering General

Source: Wiley InterScience Backfile Collection 1832-2000

Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics

Notes: The regions of applicability of the Boussinesq approximation are investigated for natural convection in a fluid-saturated porous medium. A perturbation method is used to assess the relative importance of individual terms in the differential equations which describe the natural convection process. Specific limits to the validity of the Boussinesq approximation are identified for water and air. For water, it is shown that the restrictions imposed by the classical Boussinesq approximation can be relaxed by allowing for the variation of thermophysical properties with temperature while still retaining the incompressible form of the continuity relation. Results of the analysis are verified through numerical calculations performed for steady natural convection in a planar, water-saturated porous region.

Additional Material: 6 Ill.