Rotating Rayleigh-Benard convection: The Kueppers-Lortz transition

Conference · Mon Jan 01 00:00:00 EST 1990

OSTI ID:6281003

Zhong, F; Ecke, R; Steinberg, V

Rayleigh-Benard convection with rotation about a vertical axis is investigated for small dimensionless rotation rates 0 < {Omega} < 50. The convection cell is cylindrical with aspect ratio {Gamma} = 10 and the convecting fluid is water with a Prandtl number of 6.8 at T = 23.8C. Comparisons are made between experimental data and linear stability theory for the onset Rayleigh number and for the wave number dependence of the convective pattern. The nonlinear Kueppers-Lortz transition is found to occur significantly below the theoretically expected rotation rate {Omega}{sub c} and to be nucleated by defects created at the lateral cell walls. 20 refs., 10 figs.

• Research Organization: Los Alamos National Lab., NM (USA)
• Sponsoring Organization: USDOD
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6281003
• Report Number(s): LA-UR-90-3819; CONF-9005237-8; ON: DE91004835; CNN: DPP88-50
• Resource Relation: Conference: 10. annual conference on nonlinear science: the next decade, Los Alamos, NM (USA), 21-25 May 1990
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
FLUID FLOW
CONVECTION
BOUNDARY CONDITIONS
INSTABILITY
NONLINEAR PROBLEMS
PRANDTL NUMBER
WATER
ENERGY TRANSFER
HEAT TRANSFER
HYDROGEN COMPOUNDS
MASS TRANSFER
OXYGEN COMPOUNDS
640410* - Fluid Physics- General Fluid Dynamics