Fraunhofer Institute for Surface Engineering and Thin Films IST
Illustration of the development of the charge Q of a particle in PALADIN. Visible are the targets (gray, center) and the substrate (yellow, top) of the EOSS®.
Simulation of the transport of dust and aerosols
Combination of flow and particle simulation in various pressure regimes
The simulation code PALADIN, developed at Fraunhofer IST, contains numerous physical mechanisms on dust particles, can be easily extended and also considers the interaction between particles and wall. Gas flow and electric potential distributions can be imported from various codes (CFD tools and our DSMC / PIC-MC simulation tool). Our experience is based on various projects on dust particles in physical vapor deposition, aerosol transport in indoor flows and removal of regolith by high-voltage electric fields.
Analysis of dust and aerosol transport in low-pressure and atmospheric pressure regime
Dust particles cause defects in deposited layers, electrooptical devices or - in form of aerosols - cause contaminations and infections in production sites, buildings or transport vehicles. A model based analysis of their transport dynamics enables to minimize dust particle contamination; this holds for atmospheric pressure flows by optimization of the arrangement of air filters as well as for deposition chambers by optimization of their component arrangement. Fraunhofer IST offers support for setting up coupled CFD / particle simulations, it is further possible to license the PALADIN code.