Eldorado - Repositorium der TU Dortmund
Ressourcen aus und für Forschung, Lehre und Studium
Bei diesem Service handelt es sich um das Institutionelle Repositorium der Technischen Universität Dortmund. Hier werden Ressourcen aus und für Lehre, Studium und Forschung gespeichert, erschlossen und der Öffentlichkeit zugänglich gemacht.
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Aktuellste Veröffentlichungen
Item type:Item, Impact of the spindle number on the material transport and mixing during planetary roller melt granulation(2024-04-01) Lang, Tom; Bartsch, JensIn comparison to the established twin-screw machines, the application of a planetary roller granulator for continuous operation of melt granulation is a promising alternative based on the unique process concept. An initial study focused on the material transport during processing as a key driver for the overall performance. Hereby, the impact of direct process parameters on the residence time distribution was the main objective. These investigations are complemented in this study by considering the free processing volume, which is defined by the number of planetary spindles applied within a module. The impact on the processing conditions is evaluated with respect to the process setting in terms of feed rate and rotation speed. The results highlight the potential of altering the underlying transport function in planetary roller melt granulation (PRMG) via the investigated direct process and equipment parameters. The impact of the feed rate is lower in comparison, while a higher rotation speed as well as a higher free processing volume promote material mixing. Moreover, a normalization of the determined residence time distribution (RTD) model data was feasible with respect to the process settings and the number of applied planetary spindles in the processing zone. This demonstrates the key role of the free processing volume in the fundamental mechanisms of material transport and mixing during PRMG.Item type:Item, Generating fully developed flow profiles for simulations of viscoelastic fluids described by differential models(2026-02) Westervoß, Patrick; Damanik, Hogenrich; Mierka, Otto; Ouazzi, Abderrahim; Turek, StefanIn this paper, an iterative method is developed to compute the flow profiles of a viscoelastic fluid without solvent part described by various differential models in case of a two-dimensional fully developed channel flow. Therefore, the tensorial formulation of the models for the conformation tensor is written as a nonlinear one dimensional system of equations for the unknown components of the conformation tensor, the pressure and the velocity field. On the basis of an initial guess for the pressure drop, the unknown quantities can be determined iteratively. For sufficiently high relaxation times, the resulting flow profiles show typical viscoelastic behaviour. Furthermore, corresponding two-dimensional Finite Element simulations of a Poiseuille flow through a plane channel are used to perform a validation of the determined flow profiles for the Giesekus model.Item type:Item, Item type:Item, Digitale Escape Games in der Hochschullehre(2026-03) Herold-Blasius, Raja; Kleinschmidt, VeraItem type:Item, Amtliche Mitteilungen der Technischen Universität Dortmund Nr. 8/2026(Technische Universität Dortmund, 2026-03-30)