絮凝动力学的现状与研究方法进展

在絮凝动力学的发展中先后提出了Smoluchowski理论、Camp-Stein理论和微涡旋理论,但迄今尚存在若干不足,特别是还不能全面揭示湍流絮凝的致因,也未能得到符合实际的湍流絮凝速度方程,严重影响了水处理絮凝工艺与设备的设计及放大.近年来,粒子图像速度场仪(PIV)和计算流体力学(CFD)的发展为深入研究絮凝动力学提供了新的手段和方法,有望使湍流絮凝动力学得到进一步发展.

Current state of flocculation dynamics and methodology progress

Although Smoluchowski theory, Camp-Stein theory and Micro vortex theory have been proposed successively up to now in the development of flocculation dynamics, there are still some disadvantages in this area, for example, the mechanism of flocculation in turbulent flow has not been totally revealed and its velocity equation which is more in line with the actual process have not been obtained. This current state has been affecting the design and scale up of flocculation basin seriously. The Particle Image Velocimetry(PIV)and the Computational Fluid Dynamics(CFD) developed in recent years make it possible to verify the reasons which cause the turbulent flocculation and to develop the turbulent flocculation dynamics further.