[부직포] Simulation of Fiber Entanglement by Modeling Vorticity in Water Flow Field 출판일 : 2007.05.01 저자 : Ping Xiang, Andrey V. Kuznetsov, Abdel-Fattah M. Seyam 서지사항 : Textile Research Journal, Volume 77, Issue 5, 312페이지 등록일 : 2011.10.25 I 조회수 : 155 작성자 : admin |
This research developed a model of the hydroentanglement process, based on the first
principles of fluid mechanics. This model proceeded from the assumption that fiber
entanglement in the hydroentanglement process is proportional to the average vorticity in the
fiberweb. Two-dimensional simulations of the water flow through the fiberweb and forming
surfaces were performed in the plane perpendicular to the machine direction (MD). In these
two-dimensional simulations the time-dependent development of the flow field was
investigated, and it was found that the vortices induced by the water jets were influenced
by the jet pressure and diameter. It was shown that the maximum average vorticity in the
fiberweb occurred at a water jet diameter of 0.127 mm which explains why jets of such
diameter are commonly used in industry. Three-dimensional simulations were also
performed to account for the realistic geometry of the computational domain. The influence of
the forming surface permeability was investigated and it was shown that the fiber
entanglement increased as the open area of the forming surface decreased.
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