Berlin 2024 – scientific programme
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VA: Fachverband Vakuumphysik und Vakuumtechnik
VA 3: Vacuum Science and Technology (Poster Session)
VA 3.1: Poster
Tuesday, March 19, 2024, 12:30–14:30, Poster A
An improved numerical simulation methodology for nano particle injection through aerodynamic lens systems — •Surya Kiran Peravali1,4, Amit K Samanta1,3, Muhammed Amin1, Jochen Küpper1,2,3, Philipp Neumann4, and Michael Breuer4 — 1Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 2Department of Physics, Universität Hamburg, Germany — 3Center for Ultrafast Imaging, Universität Hamburg, Germany — 4Fakultät für Maschinenbau und Bauingenieurwesen, Helmut-Schmidt-Universität,Germany
Aerosol injectors applied in single-particle diffractive imaging (SPI) experiments have demonstrated their potential in efficiently delivering nano-particles with high density [1]. Continuous optimization of injector design is crucial for achieving high density particle streams, minimizing background gas, enhancing X-ray interactions, and generating high-quality diffraction patterns. In this contribution, we present a simulation framework designed for the fast and effective exploration of the experimental parameter space to enhance the optimization process. The framework includes simulating carrier gas and particle trajectories within injectors and their expansion into the experimental vacuum chamber by utilizing a hybrid continuum-molecular simulation method (CFD/DSMC) to accurately capture the multiscale nature of the flow. We elaborate the simulation setup, present initial benchmarking results from our coupled approach, and validate the methodology against experimental data.
[1] N.Roth et al., J. Aerosol Sci. 124, 17 (2018)
Keywords: DSMC; Nano-particle injection; Continuum assumption; Transition regime; Rarefied flow