Nutzenoptimierter RFID-Einsatz in der Logistik

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The Immersed Boundary Method (IBM) is a numerical approach in computational fluid dynamics, particularly effective for complex and dynamic geometries. This method immerses the geometry into a computational grid, solving the Navier-Stokes equations while adhering to boundary conditions at the intersections of the surface discretization and grid cells. The work details the implementation, validation, and application of this IBM approach, emphasizing the Ghost-Cell technique for providing boundary conditions. It also covers fast detection of cell intersections, grid adaptation techniques, and numerical algorithms for managing the resulting equation systems. The methodology is further developed to address Fluid-Structure Interaction (FSI) by integrating a Finite-Element based structural solver, which is validated and loosely coupled with the CFD solver through the exchange of fluid forces and the geometry of the elastic body. The methods are applied to two scenarios. The first investigates airflow through various central airway geometries, revealing smooth secondary flow structures and Dean vortices downstream of bifurcations in a generic lung model. In the more complex case of a dynamic tracheobronchial tree from a pig, the influence of surface motion is significant, generating asymmetrical counter-rotating vortices during respiration. The second scenario examines FSI with a quasi-steady flow past an elastic cylinder shell, where