(187l) Effect of Temperature on the Morphology of Extruded Strand in Fused Deposition Modeling: A CFD Study

Fused Deposition Modeling (FDM) is an extrusion-based additive manufacturing technique. In FDM process, 3D object is built by extrusion and deposition of polymer melt, layer by layer, on a substrate plate. Although there have been several numerical modeling studies regarding FDM, most of these studies focus solely on either inside or outside of the nozzle, leading to incomplete evaluation of the process. In this study, isothermal and non-isothermal simulations of the process, considering both inside and outside of the nozzle, have been performed. For this purpose, a user-defined module has been developed for OpenFOAM CFD package. Numerical simulation results for shape of an extruded strand have been validated by comparing with experimental results. Moreover, the effects of geometrical and process parameters on the deposition of the layer and the surface roughness of final products are studied.