caa a22 4500 388021527 CHVBK 20180307124925.0 cr unu---uuuuu 161130e199802 xx s 000 0 eng 10.1557/JMR.1998.0063 doi S0884291400043004 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0063 Practical aspects in the drawing of an optical fiber [Elektronische Daten] The transport processes in the furnace for the continuous drawing of optical fibers have been studied numerically and analytically. Practical circumstances and operating conditions are considered. A peripheral gas flow configuration has been modeled, along with irises at the ends, as employed in practical furnaces. The neck-down profile of the fiber is not chosen, but has been generated on the basis of a surface force balance. The results obtained are validated by comparisons with earlier experimental results. A detailed analysis has been carried out to determine the relative contributions of different forces during the drawing process. Even though the internal viscous stress is shown to be the major contributor to the draw tension, it is found that under certain operating conditions, the force due to gravity is significant, especially at the beginning of the neck-down region. For a peripheral flow configuration, the effect of flow entrance is found to be very important in determining the necking shape. However, the effect of the iris size on the fiber temperature field is found to be negligible. It is found that for a given furnace temperature and fiber radius, there is an upper limit for draw-down speed at which a fiber can be drawn without rupture. Practical ranges of draw speeds and furnace temperature conditions are identified for the process to be feasible. Copyright © Materials Research Society 1998 Roy Choudhury S. Department of Mechanical and Aerospace Engineering, Rutgers University, New Brunswick, New Jersey 08903 Jaluria Y. Department of Mechanical and Aerospace Engineering, Rutgers University, New Brunswick, New Jersey 08903 Journal of Materials Research Cambridge University Press 13/2(1998-02), 483-493 0884-2914 13:2<483 1998 13 JMR https://doi.org/10.1557/JMR.1998.0063 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0063 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Roy Choudhury S. Department of Mechanical and Aerospace Engineering, Rutgers University, New Brunswick, New Jersey 08903 NATIONALLICENCE 700 1- Jaluria Y. Department of Mechanical and Aerospace Engineering, Rutgers University, New Brunswick, New Jersey 08903 NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/2(1998-02), 483-493 0884-2914 13:2<483 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge