A Numerical Model of Bubbling Thermoplastics
A Numerical Model of Bubbling Thermoplastics
A Numerical Model of Bubbling Thermoplastics
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Bubble Nucleation<br />
• Homogeneous vs. heterogeneous nucleation<br />
(Thermal fluctuations) (Impurities)<br />
• Arrhenius function for nucleation rate J<br />
= MB exp( − ∆F<br />
k T )<br />
• Elasticity<br />
J cr / B<br />
• Gas diffusivity through melt<br />
• Rate easily varies by 9+ orders <strong>of</strong> magnitude!
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