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Darrell Hyson Reneker

Bending frequency

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Interpretation And Use Of Glints From An Electrospinning Jet Of Polymer Solutions, Kaiyi Liu, Camden Ertley, Darrell Reneker Jul 2014

Interpretation And Use Of Glints From An Electrospinning Jet Of Polymer Solutions, Kaiyi Liu, Camden Ertley, Darrell Reneker

Darrell Hyson Reneker

Optical observations of jets provide information useful for control of electrospinning of polymer solutions. Combinations of videography, stereography, and methods for illumination of the multiple coils of an electrospinning jet path, that depend on bright glints of reflected light from the jet, recorded quantitative information about the location, vector velocity, and rotation of selected segments of the jet. New bending coils were observed to form at rates of 200–1560 turns per second. This bending frequency decreased as the capillary number of the solutions increased. The polarization of light, in glints reflected at Brewster's angle, allows measurement of the index of …