transparent gif

 

Ej inloggad.

Göteborgs universitets publikationer

On the microscopic foundation of dissipative particle dynamics

Författare och institution:
Anders Eriksson (Institutionen för fysik (GU)); Martin Nilsson Jacobi (Institutionen för energi och miljö, Fysisk resursteori, Chalmers); Johan Nyström (Institutionen för energi och miljö, Fysisk resursteori, Chalmers); Kolbjörn Tunström (Institutionen för energi och miljö, Chalmers)
Publicerad i:
Europhysics Letters, 86 ( 4 )
ISSN:
0295-5075
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2009
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
Mesoscopic-particle-based fluid models, such as dissipative particle dynamics, are usually assumed to be coarse-grained representations of an underlying microscopic fluid. A fundamental question is whether there exists a map from microscopic particles in these systems to the corresponding coarse-grained particles, such that the coarse-grained system has the same bulk and transport properties as the underlying system. In this letter, we investigate the coarse-graining of microscopic fluids using a Voronoi-type projection that has been suggested in several studies. The simulations show that the projection fails in defining coarse-grained particles that have a physically meaningful connection to the microscopic fluid. In particular, the Voronoi projection produces identical coarse-grained equilibrium properties when applied to systems with different microscopic interactions and different bulk properties. © EPLA, 2009
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Fysik
Nyckelord:
molecular-dynamics, simulations, fluid, suspensions, systems
Postens nummer:
124946
Posten skapad:
2010-08-20 11:21
Posten ändrad:
2016-06-29 11:04

Visa i Endnote-format

Göteborgs universitet • Tel. 031-786 0000
© Göteborgs universitet 2007