A Numerical Model of Bubbling Thermoplastics

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Energy Equation RT E p p v p Be H z T k z z T W t T c / * * * ) ( − − ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ ∂ ∂ ∂ ∂ = ⎟ ⎠ ⎞ ⎜ ⎝ ⎛ ∂ ∂ + ∂ ∂ φ ρ ρ k p k k k p c c ∑ = φ ρ ρ * ) ( where ∑ ∑ = k k k k k W W φ ρ φ ρ * g p g p k k k φ φ ) ( ) ( * =
• Nucleation • Bubble growth • Migration • Coalescence • Bursting Bubble <strong>Model</strong>
Page 1 and 2: A Numerical Model of Bubbling Therm
Page 3 and 4: Microscopic Photographs of PMMA Kas
Page 5: • Polymer ∂ ∂t •Gas ∂ ∂
Page 9 and 10: Secondary Nucleation 1 m 5 m Yarin
Page 11 and 12: Bubble Migration • Driven by grav
Page 13 and 14: Bubble Velocity Nearing Interface B
Page 15 and 16: Thin-film Drainage
Page 17 and 18: Bubble Model R & ∆poly → ∆gas
Page 19 and 20: Effects of Bursting Delay in PP Dra
Page 21 and 22: Temperature vs Time for Sample Surf
Page 23 and 24: PP vs. PMMA
Page 25: Conclusions • Bubbling behavior i

A Numerical Model of Bubbling Thermoplastics

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