Numerical approach to modeling fiber motion during melt blowing

2010 ◽  
Vol 119 (4) ◽  
pp. 2112-2123 ◽  
Author(s):  
Y. C. Zeng ◽  
Y. F. Sun ◽  
X. H. Wang
Keyword(s):  
Numerical Approach ◽  
Melt Blowing ◽  
Fiber Motion

Study on airflow field and fiber motion with new melt blowing die

2019 ◽  
Vol 59 (6) ◽  
pp. 1182-1189 ◽  
Author(s):  
Wanli Han ◽  
Sheng Xie ◽  
Jing Shi ◽  
Xinhou Wang
Keyword(s):  
Melt Blowing ◽  
Fiber Motion ◽  
Airflow Field

scholarly journals Fiber Motion near the Collector during Melt Blowing: Part 2 — Fly Formation

2002 ◽  
Vol os-11 (3) ◽  
pp. 1558925002OS-01 ◽  
Author(s):  
Randall R. Bresee ◽  
Uzair A. Qureshi
Keyword(s):  
Processing Parameters ◽  
Experimental Measurements ◽  
Melt Blowing ◽  
Fiber Motion ◽  
On Line

On-line and off-line measurements were obtained to gain an understanding of fly production during multi-hole melt blowing at commercial speed. These measurements allowed us to describe the effects of common processing parameters on fly production and develop a model for fly formation that begins to account for experimental measurements.

Numerical Evaluation of Single Fiber Motion for Short Fiber Composites Materials Processing

2010 ◽  
Author(s):  
Dongdong Zhang ◽  
Douglas E. Smith ◽  
David A. Jack ◽  
Stephen Montgomery-Smith
Keyword(s):  
Original Work ◽  
Polymer Melt ◽  
Numerical Approach ◽  
Short Fiber ◽  
Single Fiber ◽  
Axis Ratio ◽  
Runge Kutta Method ◽  
Composites Materials ◽  
Fiber Motion ◽  
Angular Velocities

This paper presents a numerical approach for calculating the single fiber motion in a viscous flow. This approach addresses such issues as the role of axis ratio and fiber shape on the dynamics of a single fiber, which was not addressed in Jeffery’s original work. We develop a Finite Element Method (FEM) for modeling the dynamics of a single rigid fiber suspended in a moving fluid. Low Reynolds number viscous flows are considered since these best represent the flow conditions for a polymer melt within a mold cavity. Our approach seeks the fiber angular velocities that zero the hydrodynamic torques acting on the fiber using the Newton-Raphson method. Fiber motion is then computed with a Runge-Kutta method to update the position, i.e. the angle of the fiber as a function of time. This method is quite general and allows for fiber shapes that include, but are not limited to, ellipsoidal fibers (such as that studied in Jeffery’s original work), cylindrical fibers and beads-chain fibers. The relationships between equivalent axis ratios and geometrical axis ratios for cylindrical and beads-chain fibers are derived in this paper.

Influence of Die Geometry on Fiber Motion and Fiber Attenuation in the Melt-Blowing Process

2014 ◽  
Vol 53 (32) ◽  
pp. 12866-12871 ◽  
Author(s):  
Sheng Xie ◽  
Yuansheng Zheng ◽  
Yongchun Zeng
Keyword(s):  
Melt Blowing ◽  
Die Geometry ◽  
Fiber Motion

Air Flow Field and Fiber Motion in a Swirl Die Melt-Blowing Process

2013 ◽  
Vol 690-693 ◽  
pp. 2861-2865
Author(s):  
Sheng Xie ◽  
Yuan Sheng Zheng ◽  
Yong Chun Zeng
Keyword(s):  
Flow Field ◽  
High Speed ◽  
Air Flow ◽  
High Speed Camera ◽  
Important Process ◽  
Melt Blowing ◽  
Spiral Motion ◽  
Fiber Motion ◽  
Fiber Path ◽  
The Relationship

Melt blowing is an important process for producing nanofibrous nonwovens. Compared to another technology for producing nanofibrous nonwovens, electrospinning, melt blowing applies high-speed air flow field to attenuate the extruded polymer jet. In this study, the air flow field of a swirl die melt-blowing process was simulated by CFD software, Fluent 6.3. The swirling air profile was shown. Meanwhile, a high-speed camera was used to capture the fiber path below a single-orifice melt-blowing swirl die. The spiral motion of the fiber was revealed. The relationship between the fiber path and the air flow field was discussed. This paper shows the relationship between the fiber path and the air flow field in a swirl die melt-blowing process.

scholarly journals Fiber Motion near the Collector during Melt Blowing Part 1: General Considerations

2002 ◽  
Vol os-11 (2) ◽  
pp. 1558925002OS-01
Author(s):  
Randall R. Bresee
Keyword(s):  
Fiber Orientation ◽  
Flow Direction ◽  
Melt Blowing ◽  
Web Structure ◽  
Fiber Motion ◽  
On Line

We conducted numerous experiments to achieve greater understanding of multi-hole melt blowing at commercial speed. On-line measurements acquired near the collector and off-line measurements of web structure allowed us to better understand fiber speed, fiber flow direction, fiber orientation and fiber entanglement during melt blowing.

scholarly journals Probabilistic Model Development of Web Structure Formation in the Melt Blowing Process

2004 ◽  
Vol os-13 (3) ◽  
pp. 1558925004os-13
Author(s):  
Rajeev Chhabra ◽  
Robert L. Shambaugh
Keyword(s):  
Structure Formation ◽  
Model Development ◽  
Lateral Spread ◽  
Melt Blowing ◽  
Single Filament ◽  
Structural Formation ◽  
Web Structure ◽  
Fiber Motion ◽  
Probabilistic Space ◽  
The Web

A probabilistic modeling approach has been proposed to correlate motion of a filament to the web structural formation in single filament melt blowing. By treating fiber motion as a Markov process, a probabilistic space has been determined where fiber has a greatest chance of being present in the web structure and in its flight to the collection system. Based on the positional probabilities, a single fiber's motion space has been determined to be correlated to its diameter. Experimental data show that any process or material variable that leads to a variation in fiber diameter affects the lateral spread of fiber motion, and thereby web structure formation in a single filament melt blowing process.

On-line Measurement of Fiber Motion During Melt Blowing

2007 ◽  
Vol 46 (22) ◽  
pp. 7340-7352 ◽  
Author(s):  
Jessica H. Beard ◽  
Robert L. Shambaugh ◽  
Brent R. Shambaugh ◽  
David W. Schmidtke
Keyword(s):  
Melt Blowing ◽  
Fiber Motion ◽  
Line Measurement ◽  
On Line
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