Rayleigh-Bénard percolation transition study of thermal convection in porous media: numerical simulation and NMR experiments.
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.
Weber
M
M
Sektion Kernresonanzspektroskopie, Universität Ulm, 89069 Ulm, Germany.
Klemm
A
A
Kimmich
R
R