Developing lengths in woven and helical hollow fibers for Dean vortices flows
Coiling membranes enables to create in the flow Dean vortices which enhance permeate flux and bring improvements to membrane filtration processes. The Dean number enables to predict the appearance of those vortices. As it increases, a secondary flow appears with one pair of vortices. However, this flow profile only establishes when the flow is fully developed. It is useful to predict the membrane developing length to take into account the impermeable part (inlet and outlet plugs) and to calculate the real membrane area submitted to the Dean, shear stress. Austin and al. 1, and Guan and al. 2 simulated the developing angle respectively for a parabolic and a uniform flow at a tore entrance but their conditions and their results do not fit all experimental studies. Our work consisted in determining by CFD the developing length in the case of ultrafiltration with different kinds of woven or helical membrane tubes. This simulation has a wide validity range of parameters.
developing angle developing length woven or helical hollow fibers CFD
Fanny SPRINGER Emilie CARRETIER Damien VEYRET Philippe MOULIN
Université Paul Cézanne Aix Marseille, Dépt de Procédés Propres et Environnement (DPPE-CNRS-UMR 6181 Laboratoire IUSTI – CNRS UMR 6595, Technop?le de Chateau Gombert, 5, rue Enrico Fermi, 13453 Marseil
国际会议
The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)
北京
英文
2007-10-14（万方平台首次上网日期，不代表论文的发表时间）