Assessing nozzle flow dynamics in fused filament fabrication through the parametric map ¿-¿

• Type: Article in International Scientific Journal
• Date: 2024

Authors

Schuller, T (Author) Other; Fanzio, P (Author) Other; Galindo Rosales, FJ (Author) FEUP

Journal

Title: Physics of Fluids

Vol. 36

ISSN: 1070-6631

Publisher: American Institute of Physics

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-010-58E

DOI: 10.1063/5.0193715

Abstract (EN): Polymer rheology profoundly influences the intricate dynamics of material extrusion in fused filament fabrication (FFF). This numerical study, which uses the Giesekus model fed with a full rheometric experimental dataset, meticulously examines the molten flow patterns inside the printing nozzle in FFF. Our findings reveal new insight into the interplay between elastic stresses and complex flow patterns, highlighting their substantial role in forming upstream vortices. The parametric map alpha-lambda from the Giesekus model allowed us to sort the materials and connect the polymer rheology with the FFF nozzle flow dynamics. The identification of elastic instabilities, the characterization of flow types, and the correlation between fluid rheology and pressure drop variations mark significant advancements in understanding FFF processes. These insights pave the way for tailored nozzle designs, promising enhanced efficiency and reliability in FFF-based additive manufacturing.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12