Modeling and Numerical Study of Ceramic Paste Extrusion

The extrusion processes of ceramic pastes, including 3D printing, are used for the production high-value products. Ceramic paste is a complex process which depends on rheological properties, die and extruder geometries, operational parameters. Modeling quantitative analysis molding important to design proper extrudates desired strength, shape, morphology. In this paper, mathematical model ram materials established, continuity momentum equations non-Newtonian fluid based modified Herschel-Bulkley viscous were solved numerically. effects geometry feed rate distributions velocity pressure in investigated As result, steeper radial profile longitudinal higher value obtained narrow die. significantly increases at high rate, almost flat barrel. increase maximum decreases with an rate. steeply small diameter. linearly ratio length