Fused Deposition processes involve successive melting, extrusion and solidification of
thermoplastic polymer melts. Fluid mechanics and heat transfer of neat or particle-filled
polymeric melts, viscoelastic deformation and solidification ofthe roads that are being produced,
and repetitive thermal loading of the growing part are important physical processes that control
the final quality of the part. Previous computational process models investigated deposition and
cooling processes for single and multiple filaments. In the current study, complimentary
computational models are presented for the extrusion phase of the process. Impact of liquefier
and nozzle design on thermal hardware behavior and operational stability has been quantified.
Also a detailed study of temperature field near the vicinity of deposition point is presented with
particular emphasis on dimensional analysis and deposition ofmultiple material systems.Mechanical Engineerin