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Cavity flows driven by buoyancy and shear

1972; Cambridge University Press; Volume: 51; Issue: 2 Linguagem: Inglês

10.1017/s0022112072001181

1469-7645

K. E. Torrance, Russ E. Davis, Kevin Eike, P. Gill, Dan Gutman, Albert T. Hsui, Shawn D. Lyons, H. M. Zien,

Lattice Boltzmann Simulation Studies

Fluid motion driven by the combined effects of a moving wall and natura convection is examined for rectangular cavities with heightlwidth ratios of ½, 1 and 2. The Reynolds number and Prandtl number are held fixed at Re = 100 and Pr = 1; the Grashof number is varied over the range of values Gr = 0, ±10 4 , ±10 6 . Flow and temperature fields obtained from numerical solutions of the Navier-Stokes equations reveal a marked influence of buoyancy for the larger aspect ratios when Gr = ±10 6 and the dominance of buoyancy for all aspect ratios when Gr = ± 10 6 . Results are compared with earlier work where possible and some observations are offered on the convergence of the numerical solutions.