NDLI: Experimental Investigation of Transient Thermal Convection in Porous Media

Content Provider	Springer Nature Link
Author	Cooper, C. A. Crews, J. B. Schumer, R. Breitmeyer, R. J. Voepel, H. Decker, D. L.
Copyright Year	2014
Abstract	A laboratory experiment of transient thermal convection in a 1-m-high cell was conducted to compare the length and time scales of plume development to theory. The temperature field was resolved to less than 1 mm and was measured by dissolving a solution of thermochromic crystals into the water–glycerin working fluid. The time-dependent experiment was run by applying heat at the bottom boundary that eventually was $$6\,^\circ $$ C above the background temperature of the fluid. After development of a thermal boundary layer, the instability became visible at 26 min, with the development of 11, 3–4 cm width plumes growing from the boundary layer. The initially rapid growth rate reached a limiting velocity of approximately 0.5 cm min $$^{-1}$$ , and then decelerated throughout the experiment. Plumes interacted primarily by merging together; by the end of the experiment only three plumes were present. The Nusselt number at the onset of convection was 10, although it dropped to 4 after 45 min, which would be expected of a barely unstable system.
Starting Page	335
Ending Page	347
Page Count	13
File Format	PDF
ISSN	01693913
Journal	Transport in Porous Media
Volume Number	104
Issue Number	2
e-ISSN	15731634
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-06-12
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Rayleigh number Instability Buoyancy Density-driven flow Geotechnical Engineering & Applied Earth Sciences Industrial Chemistry/Chemical Engineering Hydrology/Water Resources Civil Engineering Hydrogeology Classical Continuum Physics
Content Type	Text
Resource Type	Article
Subject	Catalysis

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