Hexagonal convection patterns in atomistically simulated fluids

Details Hexagonal convection patterns in atomistically simulated fluids Hexagonal convection patterns in atomistically simulated fluids

2005-08-08

arxiv.org/abs/cond-mat/0508189v2

Phys. Rev. E (Rapid Comm.) 73, 025301 (2006)

Physics

Condensed Matter

Other Condensed Matter

4 pages, 6 figures (color figures have low resolution, high resolution figures available on author's website) Minor changes to

Scientific paper

10.1103/PhysRevE.73.025301

Molecular dynamics simulation has been used to model pattern formation in three-dimensional Rayleigh--Benard convection at the discrete-particle level. Two examples are considered, one in which an almost perfect array of hexagonally-shaped convection rolls appears, the other a much narrower system that forms a set of linear rolls; both pattern types are familiar from experiment. The nature of the flow within the convection cells and quantitative aspects of the development of the hexagonal planform based on automated polygon subdivision are analyzed. Despite the microscopic scale of the system, relatively large simulations with several million particles and integration timesteps are involved.

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