Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Volkhard Buchholtz"'
Autor:
Thorsten Pöschel, Volkhard Buchholtz
Publikováno v:
Granular Matter. 1:33-41
We investigate numerically the interaction of a stream of granular particles with a resting obstacle in two dimensions. For the case of high stream velocity we find that the force acting on the obstacle is proportional to the square of the stream vel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cde1b665c11f598f9181f76ab27d239f
https://doi.org/10.1007/pl00010908
https://doi.org/10.1007/pl00010908
Autor:
Thorsten Pöschel, Volkhard Buchholtz
Publikováno v:
International Journal of Bifurcation and Chaos. :751-757
We discuss a new optimization strategy, which considerably improves the effectivity of evolutionary algorithms applied to a certain class of optimization problems. The basic principle is to solve first a simpler related problem, which is constructed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82908cf6bae5bb870216c48fa8fcace4
https://doi.org/10.1142/s0218127497000546
https://doi.org/10.1142/s0218127497000546
Autor:
Thorsten Pöschel, Volkhard Buchholtz
Publikováno v:
Chaos, Solitons & Fractals. 5:1901-1912
The flow of granular material in a rotating cylinder was simulated by molecular dynamics in two dimensions using spherical as well as nonspherical grains. At very low but constant angular velocity we found that the flow varies irregularly with time.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92ad8bfff6d25c93b7e9cb72734c9c8a
https://doi.org/10.1016/0960-0779(94)00193-t
https://doi.org/10.1016/0960-0779(94)00193-t
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 216:199-212
We investigate the flow of granular material in a rotating cylinder numerically using molecular dynamics in two dimensions. The particles are described by a new model which allows to simulate geometrically complicated shaped grains. The results of th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0a4a4b92866deb4bd06fffa1112bcddd
https://doi.org/10.1016/0378-4371(95)00045-9
https://doi.org/10.1016/0378-4371(95)00045-9
Autor:
Thorsten Pöschel, Volkhard Buchholtz
Publikováno v:
Physical Review Letters. 71:3963-3966
The static as well as the dynamic behaviour of granular material are determined by dynamic {\it and} static friction. There are well known methods to include static friction in molecular dynamics simulations using scarcely understood forces. We propo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a3463ce9267fd16e8cfcaca4b5dc1bea
https://doi.org/10.1103/physrevlett.71.3963
https://doi.org/10.1103/physrevlett.71.3963
A novel effect in a granular material under swirling motion of the container is presented. At low packing densities the material rotates in the same direction as the swirling motion of the container (rotation). At higher densities the cluster of gran
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::882f71cfcb03da997edab50f3e55a206
http://arxiv.org/abs/cond-mat/0203437
http://arxiv.org/abs/cond-mat/0203437
Autor:
Thorsten Poeschel, Volkhard Buchholtz
Large scale computer simulations are presented to investigate the avalanche statistics of sand piles using molecular dynamics. We could show that different methods of measurement lead to contradicting conclusions, presumably due to avalanches not rea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::408869fed6fd6590a888cc62d4c72ed1
We investigate autogenous fragmentation of dry granular material in rotating cylinders using two-dimensional molecular dynamics. By evaluation of spatial force distributions achieved numerically for various rotation velocities we argue that comminuti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2cb7cbc89b2b3c66de78789829fe31dd
Autor:
Volkhard Buchholtz, Thorsten Pöschel
We propose a new model for the description of complex granular particles and their interaction in molecular dynamics simulations of granular material in two dimensions. The grains are composed of triangles which are connected by deformable beams. Par
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::840bde269078792d4caed9cde8696551
Autor:
Volkhard Buchholtz, Thorsten Poeschel
The evolution of a pile of granular material is investigated by molecular dynamics using a new model including nonsphericity of the particles instead of introducing static friction terms. The angle of repose of the piles as well as the avalanche stat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0e3673662dba2340d8ee746ad6894b8
http://arxiv.org/abs/cond-mat/9309032
http://arxiv.org/abs/cond-mat/9309032