Zobrazeno 1 - 10
of 10
pro vyhledávání: '"E. K. O. Hellén"'
Publikováno v:
Europhysics Letters (EPL). 59:186-192
We study the probability, $P_S(t)$, of a cluster to remain intact in one-dimensional cluster-cluster aggregation when the cluster diffusion coefficient scales with size as $D(s) \sim s^\gamma$. $P_S(t)$ exhibits a stretched exponential decay for $\ga
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b9fe26dd563ab69886af3424ff781fd
https://doi.org/10.1209/epl/i2002-00225-3
https://doi.org/10.1209/epl/i2002-00225-3
Publikováno v:
Journal of Statistical Physics. 98:265-280
Cooperative sequential adsorption is here extended to multilayer coverages. We discuss two different growth rules with cooperativity either restricted to only the first layer of coverage or applied in all layers. The unrestricted variant is considere
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7c2c53a898b102ae06de91b47edaa6ed
https://doi.org/10.1023/a:1018678923094
https://doi.org/10.1023/a:1018678923094
Two-dimensional cluster-cluster aggregation is studied when clusters move both diffusively and sediment with a size dependent velocity. Sedimentation breaks the rotational symmetry and the ensuing clusters are not self-similar fractals: the mean clus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a7f7ce2614b561e466160645495d5a9
Autor:
Joachim Krug, E. K. O. Hellén
Publikováno v:
Physical Review E. 66
Coarsening of sand ripples is studied in a one-dimensional stochastic model, where neighboring ripples exchange mass with algebraic rates, $\ensuremath{\Gamma}(m)\ensuremath{\sim}{m}^{\ensuremath{\gamma}},$ and ripples of zero mass are removed from t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52a089c1f3933787e1ec312f1928a87d
https://doi.org/10.1103/physreve.66.011304
https://doi.org/10.1103/physreve.66.011304
The persistence probability, $P_C(t)$, of a cluster to remain unaggregated is studied in cluster-cluster aggregation, when the diffusion coefficient of a cluster depends on its size $s$ as $D(s) \sim s^\gamma$. In the mean-field the problem maps to t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4d32656a58fc61cf5f7f8dbd4ab40e50
Autor:
E. K. O. Hellén, Mikko J. Alava
Persistence is considered in diffusion--limited cluster--cluster aggregation, in one dimension and when the diffusion coefficient of a cluster depends on its size $s$ as $D(s) \sim s^\gamma$. The empty and filled site persistences are defined as the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fc07d048b2cfcbcbd287c8c13c4f605
Publikováno v:
Scopus-Elsevier
We study the dynamic scaling properties of an aggregation model in which particles obey both diffusive and driven ballistic dynamics. The diffusion constant and the velocity of a cluster of size $s$ follow $D(s) \sim s^\gamma$ and $v(s) \sim s^\delta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b373cb2b368aaf7d378ff286d46e2b45
https://pubmed.ncbi.nlm.nih.gov/11089017
https://pubmed.ncbi.nlm.nih.gov/11089017
Autor:
Markku Kataja, Peter M. A. Sloot, Alfons G. Hoekstra, Mikko J. Alava, Drona Kandhai, E. K. O. Hellén, J. Timonen, Antti Koponen, Kaarlo Niskanen
Publikováno v:
Koponen, A, Kandhai, D, Hellén, E, Alava, M, Hoekstra, A, Kataja, M, Niskanen, K, Sloot, P & Timonen, J 1998, ' Permeability of three-dimensional random fiber webs ', Physical Review Letters, vol. 80, no. 4, pp. 716-719 . https://doi.org/10.1103/PhysRevLett.80.716
Scopus-Elsevier
Physical Review Letters, 80, 716-719. American Physical Society
Scopus-Elsevier
Physical Review Letters, 80, 716-719. American Physical Society
We report the results of essentially ab initio simulations of creeping flow through large threedimensional random fiber webs that closely resemble fibrous sheets such as paper and nonwoven fabrics. The computational scheme used in this Letter is that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4ef90d3ed059ffad0a9c532c6e251340
https://cris.vtt.fi/en/publications/008bd9e7-9c18-4dc6-8956-ff7ff0acb997
https://cris.vtt.fi/en/publications/008bd9e7-9c18-4dc6-8956-ff7ff0acb997
The bulk properties and stochastic pore geometry of finite-thickness fiber webs are studied using a realistic model for the sedimentation of flexible fibers [K. J. Niskanen and M. J. Alava, Phys. Rev. Lett. 73, 3475 (1994)]. The resulting web structu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf1af20ba14e946f6395c53302e3fc64
https://aaltodoc.aalto.fi/handle/123456789/18947
https://aaltodoc.aalto.fi/handle/123456789/18947
Publikováno v:
Journal of Applied Physics. 100:023528
The electric potential close to a boundary between two dielectric material layers reflects the geometry of such an interface. The local variations arise from the combination of material parameters and from the nature of the inhomogeneity. Here, the a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4714e89560341e0629b9bd7fd667e1bb
https://doi.org/10.1063/1.2211329
https://doi.org/10.1063/1.2211329