Kueppers-Lortz transition at high dimensionless rotation rates in rotating Rayleigh-Benard convection

Journal Article · Sat May 01 00:00:00 EDT 1993 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States)

DOI:https://doi.org/10.1103/PhysRevE.47.R2991· OSTI ID:6769308

Ning, L; Ecke, R E ^[1]

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1. Physics Division and Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

We show that for rotating Rayleigh-Benard convection over a range of dimensionless rotation rates 270[lt][Omega][lt]2500, bulk convection structures are Kueppers-Lortz unstable near onset. We used optical shadowgraph imaging to visualize the pattern dynamics, found switching angles of approximately 60[degree], and observed separate spatial domains where switchings took place at different times. The characteristic switching frequencies were found to depend weakly on the rotation rate. Finite-size and boundary effects were observed to complicate the switching dynamics close to onset.

• OSTI ID: 6769308
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States), Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics; (United States) Vol. 47:5; ISSN 1063-651X; ISSN PLEEE8
• Country of Publication: United States
• Language: English

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