【摘要】 本文利用摄像结合数字图象处理技术，实测分析含油废水在混合水箱中的扩散浓度场，验证了水体的紊动作用是油滴向水下扩散的主要动力；实验及数值计算结果表明，混合水箱中油滴紊动扩散系数Ｄｚ沿水深而增大，呈指数分布；油份浓度越大的含油废水越难向水下扩散，Ｄｚ与含油废水的油份浓度呈指数衰减关系，而与紊动强度呈线性增加关系。更多还原

【Abstract】 Based on the digital image processing technique (DIPT),the oil concentration distributions in the mixing-tank is presented to confirm that diffusion of oil droplets under water surface are mainly driven by the turbulence of the water body. Experimental data and numerical result show that the coefficient of turbulent diffusion D. exponentially increases with the water depth,exponentially decreases with the increasing of oil percentage of the waste water,and linearly increases with the turbulent intensity.更多还原