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- W1992412374 abstract "We study the transport behavior of a passive scalar in a two-dimensional (2D) time-independent Gaussian random velocity field by efficient and highly accurate numerical simulations. The model under consideration has been used in order to gain basic understanding of transport processes in incompressible flow through heterogeneous porous media. The velocity field is derived from the linearized solution of the Darcy equation with a Gauss-distributed log-hydraulic conductivity. The transport of a passive scalar is studied by a high precision random-walk method, which allows for a systematic nonperturbative study of the ensemble and effective dispersion coefficients. The conclusive numerical results validate the range of applicability of the perturbation theory and the consistency of nonperturbative approaches to the transport problem in a random medium. Furthermore, we observe closed streamlines in incompressible 2D Gaussian random fields, which restricts the direct applicability of the simulation method for transport in heterogeneous porous media, and questions the results of similar studies that do not observe this phenomenon." @default.
- W1992412374 created "2016-06-24" @default.
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- W1992412374 date "2003-04-21" @default.
- W1992412374 modified "2023-10-13" @default.
- W1992412374 title "Numerical studies of the transport behavior of a passive solute in a two-dimensional incompressible random flow field" @default.
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- W1992412374 doi "https://doi.org/10.1103/physreve.67.046306" @default.
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