Stefan Puttinger
Johannes Kepler University of Linz
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Stefan Puttinger.
Journal of Dispersion Science and Technology | 2018
Reza Farzad; Stefan Puttinger; Stefan Pirker; Simon Schneiderbauer
ABSTRACT In this paper, we investigate oil-in-water emulsions in a Taylor-Couette flow. A high-speed camera was employed to record the formation of those emulsions, and image processing was used to obtain the diameter of the droplets. No surfactants were added in order to study the pure effect of the fluid dynamical forces on the droplets. The results for three different oil-in-water emulsions show that the Sauter mean diameter considerably depends on the local shear rate and the material properties and that the droplet size distribution follows a log-normal distribution. We, therefore, propose to express the Sauter mean diameter normalized by Prandtl mixing length in terms of a correlation, which is based on the Kolmogorov turbulence theory. This correlation subsequently depends on the local shear rate and the material properties such as viscosity, density, and interfacial tension. The predictions of the correlation show fairly good agreement with the experimental measurement the Sauter mean diameter. Finally, comparing the predictions of the correlation to the data presented by Eskin et al. [Chem. Eng. Sci. 161 36–47; 2017] shows excellent agreement in the case, where the droplets are larger than the Kolmogorov length scale. GRAPHICAL ABSTRACT
BHM Berg- und Hüttenmännische Monatshefte | 2013
Stefan Pirker; Bernhard König; Stefan Puttinger; Marianne Doletschek; Harald Harmuth
Bubble stirred ladle flow is studied by means of multiphase simulations. In this study the role of turbulence modelling is discussed. Numerical simulation results reveal that turbulence modelling is crucial for the prediction of both, local and macroscopic flow characteristics. Consequently, a thorough and experimentally substantiated turbulence modelling is indispensable for picturing metallurgical transport phenomena.ZusammenfassungGasblasen gerührte Pfannenströmungen werden mithilfe Mehrphasensimulationen untersucht. In dieser Studie wird insbesondere die Rolle der Turbulenzmodellierung diskutiert. Numerische Simulationsergebnisse zeigen, dass die Wahl des Turbulenzmodells für die Vorhersage des sowohl lokalen als auch makroskopischen Strömungsverhaltens entscheidend ist. Folglich ist eine gründliche und experimentell abgesicherte Turbulenzmodellierung für die Vorhersage von metallurgischen Transportphänomenen unverzichtbar.
Aiche Journal | 2013
Simon Schneiderbauer; Stefan Puttinger; Stefan Pirker
Powder Technology | 2013
Stefan Pirker; C. Goniva; Christoph Kloss; Stefan Puttinger; J. Houben; Simon Schneiderbauer
Chemical Engineering Journal | 2015
Simon Schneiderbauer; Stefan Puttinger; Stefan Pirker; Pablo Aguayo; Vasileios Kanellopoulos
Procedia Engineering | 2015
Simon Schneiderbauer; Stefan Puttinger; Stefan Pirker
Powder Technology | 2013
Stefan Puttinger; Gerhard Holzinger; Stefan Pirker
Procedia Engineering | 2015
Stefan Puttinger; Simon Schneiderbauer; Lukas von Berg; Stefan Pirker
Powder Technology | 2017
Simon Schneiderbauer; Stefan Pirker; Stefan Puttinger; Pablo Aguayo; Vasileios Touloupidis; Alberto Martínez Joaristi
Light Metals | 2012
Christian Chimani; Richard Kretz; Simon Schneiderbauer; Stefan Puttinger; Stefan Pirker