Patent ID: 6824679
Filing Date: 2004-11-30
Classification: B01D,Y02A

Abstract:
A method for producing a multi-layered coiled hollow fiber bundle, the method comprising the steps of:(a) coiling a hollow fiber around a mandrel to form a first layer thereon, and (b) coiling said hollow fiber around said mandrel over said first layer to form a second layer thereon; wherein the coiling in step (a), the coiling in step (b), and the hollow fiber satisfy predetermined variables, such that when fluid flows through said hollow fiber at a predetermined velocity, Dean Vortices are generated in the hollow fiber in both said first and second layers, and both said first and second layers perform substantially equivalently along at least one predetermined performance parameter; and wherein said predetermined variables comprise the outer and inner diameter of said hollow fiber, the length of said hollow fiber, and the angle of winding said hollow fiber in both steps (a) and (b).