A Measurement Method of Diffusion Coefficient of Liquid Using Radial Laser Rays Formed By Cylindrical Refractive System
The precision measurement of diffusion coefficient of solution is very important for the clear understanding of material transfer and interaction between the materials. But the high precision measurement of diffusion coefficient is very difficult compared to that of the other physical quantities. In...
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| description | The precision measurement of diffusion coefficient of solution is very important for the clear understanding of material transfer and interaction between the materials. But the high precision measurement of diffusion coefficient is very difficult compared to that of the other physical quantities. In this paper, we have proposed a new method to determine the diffusion coefficient by using the radial laser rays formed by cylindrical refractive system (cylindrical glass rod) and CCD camera. The cylindrical glass rod is placed in front of laser device and then, the laser rays spread radially. The slant curve with normal distribution profile is observed by illuminating these rays to the diffusion layer boundary. This curve is recorded on PC by CCD (charge coupled device) camera and the shape of this curve varies with time. The variation of maximum value with time in the curve determines diffusion coefficient. The measured diffusivity value is in good agreement with the previous experimental result in the tendency. |
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| subjects | CCD cameras Charge coupled devices Coefficient of variation Diffusion coefficient Diffusion layers Glass Lasers Luminance distribution Normal distribution Oxidation |
| title | A Measurement Method of Diffusion Coefficient of Liquid Using Radial Laser Rays Formed By Cylindrical Refractive System |
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