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A Numerical Model of Bubbling Thermoplastics

A Numerical Model of Bubbling Thermoplastics

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Bubble Growth<br />

• <strong>Model</strong>s<br />

– Infinite domain; finite radius<br />

– Temperature gradients – radial<br />

– Dominant mechanism depends on size<br />

• Surface tension, inertia, evaporation<br />

1/<br />

2<br />

R ∝<br />

t<br />

– Diffusion-driven:<br />

– Polymer melt: between Newtonian fluid and diffusiondriven<br />

growth<br />

• Secondary nucleation<br />

– In strongly viscoelastic liquids

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