心得分享
| 2013/11/26 11月份心得報告 | |
|---|---|
| 名稱 | 11月份心得報告 |
| 日期 | 2013/11/26 |
The effects of rotating disk structure, including the blade type and number, on the velocity and shear stress distributions are discussed using the computational fluid dynamics (CFD). A rotating-disk is installed in a cylindrical chamber to construct a microfiltration module. A circular membrane is fixed on a porous support near the chamber bottom. The 3-dimensional flow fields in the modules with different rotating-disks under various operating conditions are simulated using the Fluent CFD software. The equations of continuity and momentum balances are solved numerically using a finite volume scheme with the Renormalization-Group k-epsilon turbulent model. The simulated results indicated that the disk rotating speed is the most important factor in determining the filtration flux. The optimum disk design for higher permeate fluxes and less membrane fouling can be achieved by considering the increase in the shear stress on the membrane surface. A rotating-disk with more blades can generate higher shear stress on the membrane surface under a given rotation speed. However, more power should be supplied to drive the rotating-shaft and disk.
更新日期：2013/11/26 下午 02:03:05
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