dynamics of thread movement in turbulent f low field
DESCRIPTION
Dynamics of Thread Movement in Turbulent F low Field. James Hallendorff Suman Sinha Ray Alexander L. Yarin. Motivation. Investigate instability mechanism in melt blowing. Initial setup. Used to measure Lagrangian motion. Lagrangian Results. Lagrangian Results. Eulerian Behavior. - PowerPoint PPT PresentationTRANSCRIPT
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James HallendorffSuman Sinha RayAlexander L. Yarin
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• Investigate instability mechanism in melt blowing
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• Used to measure Lagrangian motion
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• Fast Fourier Transform
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• Many harmonics, few that make a difference
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• Determine correlation between string length and snapping length or air velocity and snapping length
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• Gravity causes artificial snapping point-makes unreliable results
• New setup
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• Using a fixed-length criteria skews results
• Compare ratios of width to snapping length
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• Use the frequencies found in the FFT to augment theoretical model
• Analyze the movement of the string in a vertical position
• Use polymer solution to simulate melt blowing and to compare it to the thread movement modelConclusion: 2 months is not enough
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• "MELT BLOWN TECHNOLOGY." UT Knoxville | College of Engineering. Web. 16 July 2009. <http://www.engr.utk.edu/mse/pages/Textiles/Melt%20Blown%20Technology.htm>.
• EEC-NSF Grant #0755115
• Dr. Takoudis
• Dr. Jursich
• Qian Tao