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Effect of net surface charge on particle sizing and material recognition by using phase Doppler anemometry

机译:净表面电荷对使用相位多普勒风速计的颗粒尺寸和材料识别的影响

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摘要

By taking net surface charge into consideration, the scattering field of particles illuminated by dual laser beams of phase Doppler anemometry (PDA) is computed based on Mie's theory, and the effect of net surface charge on the phase-diameter relationship and the phase ratio is studied. It is found that the phase-diameter relationship and the relationship between the phase ratio and the refractive index of charged particles could be significantly different from those of uncharged particles, which would lead to errors in particle sizing and the measurement of refractive indices. A method of recognizing charged particles and determining the value of their surface conductivity, which is related to net surface charge, is proposed by utilizing the effect of net surface charge on the measurement of refractive indices using PDA.
机译:考虑到净表面电荷,根据米氏理论计算了相位多普勒风速计(PDA)双激光束照射的粒子的散射场,净表面电荷对相直径关系和相比的影响为研究。已经发现,带电粒子的相径关系和相比与折射率之间的关系可能与不带电粒子的相径关系明显不同,这将导致粒子尺寸和折射率测量方面的误差。通过利用净表面电荷对使用PDA测量折射率的影响,提出了一种识别带电粒子并确定与净表面电荷有关的表面电导率值的方法。

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  • 来源
    《Applied optics》 |2011年第3期|共8页
  • 作者

    Jun Zhou; Li Xie;

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  • 正文语种 eng
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