The Effect of Nonplanar Oscillations Upon the Onset of Rayleigh-Benard Convection and Other Fluid Instabilities

非平面振荡对瑞利-贝纳德对流和其他流体不稳定性的影响

• 批准号: 9123553
• 负责人: Robert Kelly
• 金额: $ 17.94万
• 依托单位: University of California-Los Angeles
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-07-15 至 1994-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9123553&HistoricalAwards=false
• 关键词: Effect; Nonplanar; Oscillations; Upon; Onset

Theoretical research will be conducted to characterize the large amplitude, non-linear stability properties of a fluid with motion driven by unstable buoyancy, but stabilized by a mechanically driven oscillatory boundary. Previous research has shown that stabilization can be achieved with the proper driving oscillation when only small amplitude disturbances are considered. The present investigation is to explore the large amplitude regime, where it is conjectured that mechanical boundary oscillations can result in a strong inhibition of thermally driven motion. The results have application to such engineering systems as Chemical Vapor Deposition of thin films, where prevention of flow instabilities could result in larger useful rates of deposition.

将进行理论研究，以表征 流体大振幅非线性稳定性 运动由不稳定的浮力驱动，但由 机械驱动的振荡边界。以前的研究 已经表明，稳定可以实现与适当的 驱动振荡时，只有小幅度的干扰， 考虑了目前的调查是为了探索大的 幅度范围，据推测机械 边界振荡可以导致对 热驱动运动 其结果可应用于工程系统， 化学气相沉积薄膜，其中防止 流动的不稳定性可能会导致更大的有用率， 证词