caa a22 4500 463163710 CHVBK 20180406164755.0 cr unu---uuuuu 170326e20070701xx s 000 0 eng 10.1007/s11242-006-9045-8 doi (NATIONALLICENCE)springer-10.1007/s11242-006-9045-8 A discussion on the effect of heterogeneity on the onset of convection in a porous medium [Elektronische Daten] [D. Nield, Craig Simmons] The effect of heterogeneity on the onset of convection induced by a vertical density gradient in a saturated porous medium is discussed. The distinction between moderate and high heterogeneity of permeability is emphasized. Topics discussed include the limitations of the use of the log-normal distribution for permeability, the different effects of vertical and horizontal heterogeneity, and the use of an electrical resistor analogy applied to an illustrative quartered-square example. In a postscript, a new approximate criterion for instability applicable to the case of strong heterogeneity is proposed. Springer Science+Business Media, Inc., 2006 Heterogeneity nationallicence Stability nationallicence Natural convection nationallicence Nield D. Department of Engineering Science, University of Auckland, Private Bag 92019, Auckland, New Zealand aut Simmons Craig School of Chemistry, Physics and Earth Sciences, Flinders University, GPO Box 2100, 5001, Adelaide, SA, Australia aut Transport in Porous Media Kluwer Academic Publishers 68/3(2007-07-01), 413-421 0169-3913 68:3<413 2007 68 11242 https://doi.org/10.1007/s11242-006-9045-8 text/html Onlinezugriff via DOI 1 brief-communication jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11242-006-9045-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nield D. Department of Engineering Science, University of Auckland, Private Bag 92019, Auckland, New Zealand aut NATIONALLICENCE 700 1- Simmons Craig School of Chemistry, Physics and Earth Sciences, Flinders University, GPO Box 2100, 5001, Adelaide, SA, Australia aut NATIONALLICENCE 773 0- Transport in Porous Media Kluwer Academic Publishers 68/3(2007-07-01), 413-421 0169-3913 68:3<413 2007 68 11242 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer