Numerical simulation of the flow in a rotating-disk membrane module

T.G. Kang*, K.S. Moon, J.S. Kim, Korea Aerospace University; G.K. Park, S.U. Kim, BKT Co. Ltd., , Korea

A common problem in crossflow filtration (CFF) is progressive fouling on membrane surfaces by rejected particles, increasing the resistance to the permeate flow and subsequently leading to the decline in the permeate flux. To mitigate the progress of fouling, in another type of filtration called dynamic filtration (DF), an active control over the flow in a filtration module is introduced by moving parts such as rotating disks, rotating membranes, impellers, or vibrating components. In a DF system, applying higher shear stresses on the membrane surface delays the progress of fouling, but it requires more energy compared with a classical CFF module without any moving part. To realize an energy-efficient dynamic filtration module, it is crucial to understand detailed flow characteristics influenced by operating conditions and geometrical parameters of the module. In this regard, we attempt to investigate the flow in a dynamic filtration module that consists of a periodic stack of a rotating disk placed between two fixed membranes. A commercial CFD software (ANSYS-CFX 18.0) is employed to solve the flow in the filtration module. The present study presents an example in which CFD can be an efficient tool in understanding the flow phenomena in a filtration module and choosing a proper set of operating conditions and geometrical parameters to enhance filtration performance...

Session: M4 - Short Oral + Poster Presentations
Day: 14 March 2018
Time: 14:45 - 16:45 h

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