About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Computational Modeling and Experimental Validation of Primitive Formation in Binder Jet 3D Printing |
Author(s) |
Joshua Wagner, C. Fred Higgs III |
On-Site Speaker (Planned) |
Joshua Wagner |
Abstract Scope |
While significant advancements in binder jet 3D printing (BJ3DP) technology have been realized through experimental approaches, various physical limitations, such as exceedingly small length and time scales, often make direct empirical observations intractable. Consequently, there remains an incomplete understanding of the fluid and particle dynamics governing the agglomeration of powder during liquid binder deposition. This cluster of bound particles, known as a primitive, is the fundamental building element of the part and its characteristics have important implications on the quality of the final component. In this work, we present fully resolved simulations of primitive formation events modeled with a novel computational fluid dynamics (CFD) and discrete element method (DEM) framework. The volume-of-fluid (VOF) method is used to capture the dynamic binder-air interface and the resulting capillary forces responsible for primitive formation. The framework is deployed for parametric studies to determine optimal combinations of process parameters with various powder systems. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |