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CFD simulation of the wind field over a terrain with sand fences: Critical spacing for the protected soil area
Izael A. Lima, Eric J. R. Parteli, Yaping Shao +3
Sand fences are often erected to reduce wind speed, prevent aeolian soil erosion, and induce sand deposition and dune formation in areas affected by sand encroachment and desertifi…
Self-organization and Nonuniversal Anomalous Scaling in Non-Newtonian Turbulence
H. J. Seybold, H. A. Carmona, H. J. Herrmann +1
We investigate through Direct Numerical Simulations (DNS) the statistical properties of turbulent flows in the inertial subrange for non-Newtonian power-law fluids. The structural…
Tomographic Study of Internal Erosion of Particle Flows in Porous Media
Filippo Bianchi, Falk K. Wittel, Marcel Thielmann +2
In particle-laden flows through porous media, porosity and permeability are significantly affected by the deposition and erosion of particles. Experiments show that the permeabilit…
Poiseuille flow in curved spaces
J. -D. Debus, M. Mendoza, S. Succi +1
We investigate Poiseuille channel flow through intrinsically curved media, equipped with localized metric perturbations. To this end, we study the flux of a fluid driven through th…
Lattice-Boltzmann Method for Geophysical Plastic Flows
Alessandro Leonardi, Falk K. Wittel, Miller Mendoza +1
We explore possible applications of the Lattice-Boltzmann Method for the simulation of geophysical flows. This fluid solver, while successful in other fields, is still rarely used…
Particle and particle pair dispersion in turbulence modeled with spatially and temporally correlated stochastic processes
Thomas Burgener, Dirk Kadau, Hans Jürgen Herrmann
In this paper we present a new model for modeling the diffusion and relative dispersion of particles in homogeneous isotropic turbulence. We use an Heisenberg-like Hamiltonian to i…