Abstract
Numerical computation of silica glass deformation in optical fiber drawing from preform has been carried out to reveal thermal and dynamic characteristics of the process. This report presents numerical procedure of the calculation and results of two cases. One case is that continuity and momentum equation are solved one-dimensionally in drawing direction and energy equation is solved axi-symmetrically, and the other case is that these three equations are solved one-dimensionally. As a result, two things are implicated. 0ne thing is that one-dimensional calculation, as the later case, would be enough to compare neck-down profile and drawing tension from practical viewpoint, because the discrepancy of them in these two cases is not so large. Another thing is that inertia force, surface tension and viscous dissipation are not essential in the process, because they have little effect on drawing tension.
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