Experiments on the stabilization of the no-motion state of a fluid layer heated from below and cooled from above
Experiments on the stabilization of the no-motion state of a fluid layer heated from below and cooled from above
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下加热上冷却流体层静止状态稳定实验
DOI：
10.1017/s0022112098008891
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发表时间：
1997
影响因子：
3.7
通讯作者：
H. Bau
中科院分区：
文献类型：
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作者：
Jie Tang;H. Bau
实验证明，通过使用反馈控制，有可能稳定被限制在从下加热和从上冷却的圆柱体中的流体层的无运动（导电）状态（瑞利-巴姆纳德问题），从而推迟从无运动状态过渡到细胞对流。控制系统采用多个传感器和执行器。执行器由单独控制的加热器组成，该加热器微制在形成测试单元底部的硅片上。传感器是安装在流体中部的二极管。传感器监测流体温度与预设值的偏差，并指示执行器以这种方式消除这些偏差。
It is demonstrated experimentally that through the use of feedback control, it is possible to stabilize the no-motion (conductive) state of a fluid layer confined in a circular cylinder heated from below and cooled from above (the Rayleigh–Bénard problem), thereby postponing the transition from a no-motion state to cellular convection. The control system utilizes multiple sensors and actuators. The actuators consist of individually controlled heaters microfabricated on a silicon wafer which forms the bottom of the test cell. The sensors are diodes installed at the fluid's midheight. The sensors monitor the deviation of the fluid temperatures from preset, desired values and direct the actuators to act in such a way as to eliminate these deviations.
N. Toshima：“电荷转移耦合通道计算中托马斯峰的识别”《物理评论快报》66。（1991）
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