BUOYANCY INSTABILITY IN THE NATURAL CONVECTION BOUNDARY LAYER AROUND A VERTICAL HEATED FLAT PLATE

作者：Yan Dachun Zhang Hanxun

来源：Acta Mechanica Sinica, 2002, 18(02): 126-132.

DOI：10.1007/bf02487467

• buoyancy instability
• neutral curve
• vortex wave
• eigenmode
• thermal transition

<正> A systematic research on the buoyancy instability in the naturalconvection boundary layer was conducted,including the basic characteristics such asits spectral components,wave length and velocity,the location of its critical layer,and amplitude distributions of the triple independent eigenmodes with the linearinstability theory,the growth rates of its temperature and velocity fluctuations andthe corresponding neutral curves for the buoyancy eigenmode were also obtained.Results indicated that the neutral curve of the velocity fluctuation had a nose shapeconsistent with that obtained in the numerical calculation,but for the temperaturefluctuation,a ring-like region could be measured at a lower Grashof number beforethe nose-shaped main portion of the neutral curve.

• 出版日期2002-4-15
• 单位北京大学