The MIIS Eprints ArchiveBoundary Layers and Material Deformation in Fiber DrawingDavidAmbroseauthorRichardBraunauthorCynthiaDeBisschopauthorPierreGremaudauthorPeterHowellauthorPeterKramerauthorColinPleaseauthorJose DomingoSalazar GonzalezauthorDonaldSchwendemanauthorWe study two fluid dynamical issues which are important in the manufacture of thin glass fibers for communication networks and materials. Such thin fibers are obtained by rapidly pulling molten glass through an array of successively smaller holes. Through asymptotic analysis and physical modeling, we obtain a quantitative description of the flow and structure of the glass fiber as it is being pulled. We examine in particular the issue of whether initially planar cross sections remain planar, and find that they do so approximately, but not exactly, even in the absence of such factors as gravity, surface tension, and inertia. We also develop a quantitative theory for the structure of the air flow near the fiber, which is an important ingredient in determining how fast the fiber cools. In particular, we develop a description for the structure of the boundary layer near a fiber which has accelerating surface velocity and shrinking radius which is comparable or thin compared with the thickness of the boundary layer. One novel feature is that the acceleration of the fiber surface velocity leads to a compression of the boundary layer as it evolves downstream.Materials2002Study Group Report

For work being deposited by its own author: In self-archiving this collection of files and associated bibliographic metadata, I grant The MIIS Eprints Archive the right to store them and to make them permanently available publicly for free on-line. I declare that this material is my own intellectual property and I understand that The MIIS Eprints Archive does not assume any responsibility if there is any breach of copyright in distributing these files or metadata. (All authors are urged to prominently assert their copyright on the title page of their work.)

For work being deposited by someone other than its author: I hereby declare that the collection of files and associated bibliographic metadata that I am archiving at The MIIS Eprints Archive) is in the public domain. If this is not the case, I accept full responsibility for any breach of copyright that distributing these files or metadata may entail.

Clicking on the deposit button indicates your agreement to these terms.