Air lubrication has a high potential to reduce skin friction of ship hulls. Active air lubrication system are already available on the market and initial results could show significant long-term energy savings of 4 %. The EU project AIRCOAT (Air Induced friction Reducing ship Coating) aims to develop a passive air lubrication technology inspired by...
This paper presents numerical simulations of the atomization of viscous liquids, focusing on the combination of the liquid breakup and droplet transport processes. Coaxial high-speed gas jet created by a High Volume Low Pressure (HVLP) spray gun was used. The VOF-to-DPM model, namely coupled Volume of Fluid and Lagrangian particle tracking approach...
Das DED Auftragschweißen ist ein additives Fertigungsverfahren für Metalle, bei dem das Material schichtweise auf ein Substrat aufgetragen wird. Die schnellen Temperaturzyklen rufen Spannungsgradienten im Bauteil hervor. Der schichtweise Aufbau der Bauteile verursacht eine anisotrope Mikrostruktur. Mittels nachgelagerter Wärmebehandlung können dies...
In dem Bereich der Karosserielackierung ist die Hochrotationszerstäubung mit Elektrostatik ein längst für nahezu alle Lackiervorgänge etabliertes Applikationsgerät. Aktuelle Forschungen haben sich im dem genauen Verständnis der Tröpfchenentstehung beschäftigt, um Lackierfehler schneller abstellen zu können.
The present contribution deals with numerical and experimental studies of the primary liquid breakup process using a high-speed rotary bell atomizer. The first part of the investigations focuses on the film formation on the distributor disk and the inner surface of the rotary bell. Numerical simulations using the volume-of-fluid approach were carri...
The present contribution deals with numerical and experimental studies of the primary liquid breakup process using a high-speed rotary bell atomizer. The investigation focuses on the disintegration process of the paint liquid in the near-bell region. A hybrid multiphase model that links the Volume of Fluid (VOF) model and the Discrete Phase Model (...
Within the framework of the Franco-German climate mission MERLIN, the methane concentration in the earth's atmosphere is to be measured with global coverage in order to verify and improve existing climate models. The great advantage of the spaceborne LIDAR measurement system from MERLIN over existing systems is the active measurement process, that ...
The present contribution deals with numerical and experimental studies of the primary liquid breakup process using a high-speed rotary bell atomizer. The investigation focuses on the disintegration process of the paint liquid in the near-bell region. The volume of fluid (VOF) approach and Reynolds stress model are used in the CFD software Ansys Flu...
The present contribution deals with numerical and experimental studies of the primary liquid breakup process using a high-speed rotary bell atomizer. The investigation focuses on the disintegration process of the paint liquid in the near-bell region. The volume of fluid (VOF) approach and Reynolds stress model are used in the CFD software Ansys Flu...
Published in HTM Journal of Heat Treatment and Materials
Austempered Ductile Iron (ADI) materials show a good combination of mechanical properties, with high tensile strength levels (800–1600 MPa) and an elongation at fracture of up to 10 %. For that reason ADI is a very attractive material group for applications under cyclic loads. However, the material properties are very sensitive to the applied proce...
