206 citations · 5k across the 136 of their papers we have counts for
8 papers · 1 filter
Numerical investigation of flow separation in the lee side of transverse dunes
Volker Schatz, Hans J. Herrmann
We investigate flow separation in the air flow over transverse sand dunes. CFD simulations of the air flow over differently shaped dunes are performed. The length of the recirculat…
Lattice Boltzmann simulations of apparent slip in hydrophobic microchannels
Jens Harting, Christian Kunert, Hans J. Herrmann
Various experiments have found a boundary slip in hydrophobic microchannel flows, but a consistent understanding of the results is still lacking. While Molecular Dynamics (MD) simu…
Spontaneous Emergence of Spatio-Temporal Order in Class 4 Automata
Jason A. C. Gallas, Hans J. Herrmann
We report surprisingly regular behaviors observed for a class 4 cellular automaton, the totalistic rule 20: starting from disordered initial configurations the automaton produces p…
Transformation of Barchans into parabolic dunes under the influence of vegetation
O. Duran, V. Schatz, H. J. Herrmann +1
Barchan dunes were found to transform into parabolic dunes and vice versa when the amount of vegetation on and around them changes. This work presents the first numerical simulatio…
Precise calculation of the threshold of various directed percolation models on a square lattice
Danyel J. B. Soares, Jose S. Andrade, Hans J. Herrmann
Using Monte Carlo simulations on different system sizes we determine with high precision the critical thresholds of two families of directed percolation models on a square lattice.…
Plug Conveying in a Horizontal Tube
Martin Strauss, Sean McNamara, Hans J. Herrmann
Plug conveying along a horizontal tube has been investigated through simulation, using a discrete element simulation approach for the granulate particles and a pressure field appro…
A driven two-dimensional granular gas with Coulomb friction
Olaf Herbst, Raffaele Cafiero, Annette Zippelius +2
We study a homogeneously driven granular gas of inelastic hard particles with rough surfaces subject to Coulomb friction. The stationary state as well as the full dynamic evolution…
Modelling formation and evolution of transverse dune fields
J. H. Lee, A. O. Sousa, E. J. R. Parteli +1
We model formation and evolution of transverse dune fields. In the model, only the cross section of the dune is simulated. The only physical variable of relevance is the dune heigh…