The goal of the planned experimental and theoretical research is the development and description of a hetero-aggregation process of different submicron particles by mixing and desublimation in a supersonic flow. For this purpose, hetero-aggregates are generated in the gas phase by a heterogeneous desublimation process. One material is sublimated in the gas phase by a powerful heater before the gas is expanded through a Laval nozzle to a supersonic flow. Due to the strong pressure and temperature reduction, the gas phase is supersaturated and the desublimation on core particles takes place, which are given into a backflow region of the expansion chamber and transported to the region of the highest supersaturation. The mixing behaviour of the components determines the shape and size of the hetero-aggregated particles. The generated hetero-aggregates are characterized according to their size distribution by Scanning Mobility Particle Spectrometer (SMPS) and Scanning Electron Microscopy (SEM). The 3D Light Scattering Sensor is used for the inline measurement of the particle shape. The complex flow behaviour and aggregate structure are investigated by cross-scale simulations of Computational Fluid Dynamics (CFD) and the Discrete Element Method (DEM). The mechanical deformation and breakage behaviour of hetero-aggregates is studied by nanoindentation and simulated by DEM.
Archive
-
2024
- March 2024 (1 entry)
- February 2024 (2 entries)
- January 2024 (1 entry)
-
2023
- November 2023 (1 entry)
- October 2023 (1 entry)
- September 2023 (2 entries)
- August 2023 (3 entries)
- July 2023 (3 entries)
- June 2023 (1 entry)
- May 2023 (2 entries)
- April 2023 (3 entries)
- March 2023 (1 entry)
- February 2023 (4 entries)
-
2022
- December 2022 (1 entry)
- November 2022 (1 entry)
- July 2022 (1 entry)
- June 2022 (1 entry)
- May 2022 (1 entry)
- April 2022 (1 entry)
- February 2022 (2 entries)
-
2021
- November 2021 (1 entry)
- October 2021 (2 entries)
- September 2021 (1 entry)
- August 2021 (1 entry)
- July 2021 (1 entry)
- June 2021 (1 entry)
- May 2021 (1 entry)
- April 2021 (2 entries)
- March 2021 (1 entry)
-
2020
- December 2020 (1 entry)
- November 2020 (1 entry)
- October 2020 (2 entries)
- September 2020 (2 entries)
- August 2020 (1 entry)
- July 2020 (3 entries)
- May 2020 (3 entries)
- April 2020 (1 entry)
- March 2020 (5 entries)
- February 2020 (1 entry)
- January 2020 (1 entry)
-
2019
- November 2019 (1 entry)
- October 2019 (3 entries)
- September 2019 (3 entries)
- August 2019 (5 entries)
- July 2019 (1 entry)
- June 2019 (2 entries)
- May 2019 (2 entries)
- April 2019 (2 entries)
- March 2019 (3 entries)
- January 2019 (4 entries)
-
2018
- July 2018 (1 entry)