一种简单有效的处理有限条纹全息干涉图的方法

本文介绍了一种简单有效的处理有限条纹全息干涉图的方法．这种方法不用对干涉图进行二值化处理，而在干涉图预处理的基础上直接用Hildtch或Pavlids细化算法对干涉图直接细化．预处理过程中，考虑到条纹边缘近似的屋顶状特性，采用一特殊的二次微分算子对干涉图进行卷积运算．这种方法由于避免了二值化处理的过程，它对于处理由于光源不均匀或吸收散射等原因引起的象面照度不均匀和条纹对比度变化较大的干涉图具有现实意义．

Prediction of Fluid Velocity Distribution near a Rising Bubble

Flow and concentration fields of liquid phase in a gas-liquid contacting system are simulated to showthe Rayleigh convection by utilizing the finite-element method. The Schlieren images in CO2-ethanol system provided direct visual verification of the present simulation, and the simulated results were well consistent with theexperimental observation. The influence of the Rayleigh convection on mass transfer is analyzed qualitatively andquantitatively based on the simulated and the experimental results.