The Adsorption in Constricted Tubes of Brownian Particles with Diffusiophoresis

• Main Authors: Wei-Yu Cheng, 鄭偉佑
• Other Authors: You-Im Chang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/92038806744574049318

碩士 === 東海大學 === 化學工程學系 === 94 === The deposition of colloidal particles onto the collector surfaces of porous media is investigated by utilizing the Brownian dynamics simulation method. The pore structure in a filter bed was characterized by the three different constricted tube models: the parabolic (PCT), the sinusoidal (SCT) and the hyperbolic (HCT) constricted tube. The effect of various shapes of the total interaction energy curves of DLVO theory and of diffusiophoresis on the collection efficiencies of particles are also examined. The simulation results show that the particle collection efficiency is strongly dependent on the shape of the total interaction energy curve, but less dependent on the geometry of the tube. The diffusiophoresis effect will increase the collection efficiency of Brownian particles. The present theoretical model is also compared with the available experimental data at the end of this thesis.