Rayleigh-Bénard Turbulent Convection
Rayleigh-Bénard convection is the flow of a fluid enclosed in a cell with bottom and top boundaries kept at fixed temperatures, the bottom being warmer than the top. Since the fluid in the vicinity of the bottom plate is warmer and therefore less dense than fluid in the upper part of the cell, an unstable layering ensues. Laboratory studies of convection have been chiefly confined to situations in which the “Boussinesq approximation” is justified. This is an approximation to the full equations of motion, which retains the temperature dependence of the density only in the buoyancy term and considers all other material properties to be uniform throughout the cell.
KeywordsBoundary Layer Rayleigh Number Turbulent Boundary Layer Thermal Boundary Layer Large Scale Flow
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