权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Multiple liquid crystal techniques of visualization for 3-D measurements in the rotating annulus experiments

旋转环实验中 3D 测量的多种液晶可视化技术

基本信息

批准号：
04559012
负责人：
TAJIMA Toshihiko
金额：
$ 1.09万
依托单位：
TOYAMA NATIONAL COLLEGE OF TECHNOLOGY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Developmental Scientific Research (B)
财政年份：
1992
资助国家：
日本
起止时间：
1992 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04559012/
关键词：
Liquid crystal techniques of visualization Chiral nematic liquid crystals Rotating annulus experiments Large-scale circulation of the atomsphere Atomspheric dynamics 液晶可視化法流体温度気象観測ジェット気流

项目摘要

Multiple liquid crystal techniques of visualization (MLCT) were investigated in the rotating annulus experiments by carrying out several experiments by the use of the apparatus with double turn tables, which was built in this research project, in order to establish the method of three-dimensional measurement of convection by MLCT.The results of our project are summerized as follows ;1) The observation of stereo-structures of convections in the baroclinic wavesLiquid crystal techniques have been usually done with only one type of liquid crystal and a horizontal slit-light. There we can observe in detail the convection of any internal section illuminated by the slit-light set at any height. But then such observation did not allow to determine the stereo-structure of the convection because of the lack of the data of the relative horizontal position of observed sections. Thus we developed the method of observing two horizontal sections of the fluid at a time with the use of three types of … More liquid crystal microspheres suitable for this purpose. As a result, we could see directly the real time movements of the stereo-structure of the baroclinic waves. Furthermore, this method was confirmed to be quite useful for providing video-pictures of fluid convections for teaching aids2) The observation of vertical convections in the baroclinic wavesProjecting a vertical slit-light from the above of the tank to cut the meridional section of the fluid and synchronizing the table of measurement devices with the drift motion of the baroclinic waves, we could observe the vertical convections in any meridional section. As a result, we could take video-pictures of the meridional temperature gradients and the real time vertical movements of the vacillation phenomena of the baroclinic waves.3) MLCT for quantative measurements of fluid temperaturesLiquid crystal techniques of visualization have been known to be suitable for the qualitative observation of convections in fluid without disturbing the flow, but has a drawback that it does not allow to detect temeratures in a wide range. We developed MLCT of injecting simultaneously several types of liquid crystals with different narrow temperature ranges in the fluid in order to make these techniques useful also for the quantative measurements of temperatures. Here it was shown that this technique affords enough number of isothermal lines in the fluid to be helpful for the measurements with accuracy up to 1。C. Less

在旋转环空实验中，为了建立多种液晶显示技术的三维测量方法，利用本研究项目建立的双转台实验装置，对多种液晶显示技术(MLCT)进行了实验研究。本课题的研究结果总结如下：1)斜压波中对流的立体结构的观测通常只用一种液晶和水平狭缝光源。在那里，我们可以详细地观察到在任何高度设置的裂隙光照射的任何内部部分的对流。但由于缺乏观测断面的相对水平位置数据，这种观测无法确定对流的立体结构。因此，我们开发了使用三种类型的…一次观察流体的两个水平切片的方法更多的液晶微球适合于这一目的。因此，我们可以直观地看到斜压波的立体结构的实时运动。2)斜压波垂直对流的观测：从水槽上方投射垂直狭缝光，切断流体的子午面，使测量装置与斜压波的漂移运动同步，可以观测到任何子午面上的垂直对流。因此，我们可以拍摄子午线温度梯度和斜压波抖动现象的实时垂直运动的视频图像。3)多层螺旋CT用于流体温度的定量测量众所周知，可视化的液晶技术适合于在不干扰流动的情况下对流体中的对流进行定性观察，但它的缺点是不允许在大范围内检测温度。我们开发了在流体中同时注入几种不同温度范围的液晶的MLCT，以便使这些技术也适用于温度的定量测量。结果表明，该技术在流体中提供了足够数量的等温线，有助于测量精度达到1。C.更少