on-site: seminar room 109
digital: link via E-Mail ([email protected])
Scientific Talk (4:00 PM to 5:00 PM): Julio Gutiérrez (HSU)
Study of nozzle influence on aerosol deposition (AD) by using 3D CFD simulations
In aerosol deposition, fine ceramic powders in sizes of less than typically 5 μm are deposited as a coating at room temperature. Aerosol deposition must be performed under a vacuum to apply such fine powders and avoid bow shock effects. According to experimental results, coating formation by aerosol deposition only occurs if particle velocities exceed a material-specific threshold velocity. Thus, knowledge of attained particle velocities over acceleration in the nozzle and under the expansion into a vacuum is essential for deriving conditions for successful deposition. In the present study, 3D-CFD simulations were used to investigate the key geometrical variables in powder acceleration. Three different nozzle geometries were investigated: a convergent nozzle, a convergent-divergent nozzle, and a convergent nozzle followed by a constant cross-section toward the exit. In addition, these three nozzle geometries were optimized to maximize the particle impact velocity. The results show that the convergent-divergent nozzle supplies the highest particle velocities within this comparison. The particle velocities attained by the other nozzles are substantially lower but could be improved by geometry.
HPC Café (5:00 PM to 6:00 PM): Piet Jarmatz (HSU)
Immediately after the talk, the HPC Café will take place.
What is the HPC Café? The goal of this new format is peer-to-peer learning within the community. At each session, an expert from the discipline will be present and available to answer questions. All target groups are warmly invited – both those with prior knowledge in the field of HPC or related disciplines and those who are just starting out.
This collaborative exchange aims to discuss direct questions and application issues in the field of HPC and related disciplines, and to jointly search for solutions. Feel free to bring your questions and concerns as well as a laptop and a cup of coffee with you.
This time, the expert Piet Jarmatz (Head of HPC Lab) from the Chair of High Performance Computing will be available to answer your questions and discuss with you in a peer-to-peer format.