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Fig. 4 | Nanoscale Research Letters

Fig. 4

From: Towards Digital Manufacturing of Smart Multimaterial Fibers

Fig. 4

Capillary breakup simulations: a Image of the simulated Si core during the first droplet formation, right before the pinch-off for Tmax = 1900 °C. Color scale represents surface velocity (scale bar = 50 μm). b Snapshot of fiber breakup experiment recording just after the first droplet pinch-off, indicating a breakup time of 14 ± 3 s (scale bar = 60 μm). c Breakup time tbreakup for different values of Tmax. The exponential dependence of tbreakup on Tmax is evident, a behavior that is expected due to the dependence of tbreakup on the core’s viscosity, which in turn depends exponentially on the temperature. The shaded rectangle encompasses the temperature range compatible with this breakup time-scale. d Si core and SiO2 cladding viscosities as a function of axial position, with temperature pro le over-imposed, for Tmax = 1900 °C

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