P. Gospodinov et V. Roussinov, NONLINEAR INSTABILITY DURING THE ISOTHERMAL DRAW OF OPTICAL FIBERS, International journal of multiphase flow, 19(6), 1993, pp. 1153-1158
The nonlinear instability of the isothermal draw of optical fibers fro
m cylindric preforms is studied. The unsteady model of the process is
solved numerically, accounting for the effects of inertia, gravity and
surface forces. The effect of viscosity and gravity on the nonlinear
stability of the process is studied. The possibility of draw resonance
occurring is shown for a rate ratio much lower than the critical one,
obtained when solving the simplified model. The proposed solution can
be used to study technological stability and to model the draw of fib
ers of other materials which behave as Newtonian fluids.