Particle simulation of three-dimensional convection patterns in a Rayleigh-B{acute e}nard system

Journal Article · Tue Jul 01 00:00:00 EDT 1997 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PhysRevE.56.1218· OSTI ID:526976

Watanabe, T; Kaburaki, H ^[1]

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1. Research and Development Group for Numerical Experiments, Japan Atomic Energy Research Institute, Tokai-mura, Naka-gun, Ibaraki-ken, 319-11 (Japan)

The transition of convection patterns in the three-dimensional Rayleigh-B{acute e}nard system is simulated using the direct simulation Monte Carlo method. The simulation region is a rectangular box with an aspect ratio of 8:8:1, and the number of simulation particles is 2.048{times}10{sup 7}. A hexagonal flow pattern is observed in the convection state with the Rayleigh number slightly higher than the critical value. It is found that the hexagonal flow pattern evolves into a roll pattern with an increase in the Rayleigh number. A hysteresis is seen in the transition between the hexagonal and roll patterns. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 526976
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Vol. 56, Issue 1; Other Information: PBD: Jul 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CONVECTION
SIMULATION
THREE-DIMENSIONAL CALCULATIONS
MONTE CARLO METHOD
RAYLEIGH WAVES
HYDRODYNAMICS
TRANSITION FLOW
NAVIER-STOKES EQUATIONS
INSTABILITY
PATTERN RECOGNITION