Rayleigh-Bénard Percolation Transition Study of Thermal Convection in Porous Media: Numerical Simulation and NMR Experiments
- 7 May 2001
- journal article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 86 (19) , 4302-4305
- https://doi.org/10.1103/physrevlett.86.4302
Abstract
Thermal convection was studied as a function of the porosity in random-site percolation model objects in a Rayleigh-Bénard configuration. NMR velocity mapping experiments and numerical simulations using the finite-volume method are compared. Velocity histograms were evaluated and can be described by power laws in a wide range. The maximum velocity as a function of the porosity indicates a combined percolation/Rayleigh-Bénard transition.Keywords
This publication has 11 references indexed in Scilit:
- Fluid Flow through Porous Media: The Role of Stagnant ZonesPhysical Review Letters, 1997
- NMR microscopy of pore-space backbones in rock, sponge, and sand in comparison with random percolation model objectsPhysical Review E, 1997
- NMR imaging of thermal convection patternsMagnetic Resonance Imaging, 1996
- Computer simulation and six-dimensional spin density and velocity NMR microimaging of lacunar systems: A comparative analysis of percolation propertiesPhysical Review E, 1995
- Onset and Stability of Convection in Porous Media: Visualization by Magnetic Resonance ImagingPhysical Review Letters, 1995
- Magnetic Resonance Imaging of Thermal ConvectionJournal of Magnetic Resonance, Series A, 1993
- Visualization of convective fluid flow in a porous mediumNature, 1993
- Convection in Porous MediaPublished by Springer Nature ,1992
- Finite Element Methods and Navier-Stokes EquationsPublished by Springer Nature ,1986
- A new method of NMR flow imagingPhysics in Medicine & Biology, 1984