About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Symposium
|
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
|
Presentation Title |
Computational Fluid Dynamics Modeling of Sequential Multi-Material Extrusion Additive Manufacturing |
Author(s) |
Daniel Helmuth Meile, Md Tusher Mollah, Carl Emil Hansen, Berin Šeta, Jon Spangenberg |
On-Site Speaker (Planned) |
Daniel Helmuth Meile |
Abstract Scope |
Integrating multiple materials into extrusion-based additive manufacturing enables novel fabrication techniques and significantly expands the design freedom of the printed parts. However, multi-material extrusion remains a non-trivial task to implement, particularly due to the complex rheological behavior of the materials involved, influencing both the geometrical accuracy of the printed strand and the requirements of the printing setup, such as the nozzle design. A novel computational fluid dynamics (CFD) model has been developed, for simulating the dynamics of multiple material flows with differing rheological properties. Specifically, a scalar advection approach is used to distinguish the two materials during the extrusion and deposition of layers. This study aims to investigate strand morphology, the dynamics of sequential switching between the two materials, and the influence of nozzle geometry on performance. Overall, it provides a digital tool to better understand and optimize the complex flow phenomena inherent to multi-material extrusion additive manufacturing. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |