About this Abstract |
Meeting |
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
Symposium
|
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
|
Presentation Title |
Morphology Evolution of Droplets in a Polymer Based Extensional Flow
|
Author(s) |
David Bigio, Harsha Bharadwaj |
On-Site Speaker (Planned) |
David Bigio |
Abstract Scope |
Fused Deposition Modelling (FDM) is a widely used Additive Manufacturing (AM) method. This presentation examines the incorporation of liquid additives into the nozzle region of an FDM system to understand their behavior in the polymer melt flow. The computational
work provides background for a method wherein liquid additives are injected into the melted polymer through a single nozzle. A converging nozzle providing near constant extension rate along the centerline is modelled. The deformation of droplets inside a polymer undergoing purely extensional flow is studied for a range of exit (V) to platen (U) velocities and viscosity ratios ().The behavior of droplets for =1 is drastically different from that of lower 's, which
is attributed to the balance of shear stresses. Finally, the morphology of the deposited plastic strands is predicted. There is very different drop deformation history as the velocity ratio (V/U) transitions from V/U<1 to V/U>1. |
Proceedings Inclusion? |
Undecided |