Regensburg 2025 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 33: Modeling and Simulation of Soft Matter IV
CPP 33.2: Vortrag
Donnerstag, 20. März 2025, 12:00–12:15, H34
Porous microstructure of fibrous sheets in two transport regimes — Alexandra Serebrennikova1, Phillip Gräfensteiner2, Matthias Neumann1, Volker Schmidt2, Andoni Rodriguez3, Peter Leitl3, Werner Napetschnig1, Ekaterina Baikova1, Maximilian Fuchs1, and •Karin Zojer1 — 1Graz University of Technology, Graz, Austria — 2Ulm University, Ulm, Germany — 3bionic surface technologies, Graz, Austria
In many applications, a porous material serves multiple functions. For example, paper sheets in packaging bags should allow excess air to escape quickly while minimizing moisture migration. Although the underlying physics are different, both transport processes depend on porosity. However, each function it is likely to be supported by additional, possibly different, microstructural properties. Can these microstructural properties be optimized for all functions or is this not possible due to inherently dependent properties? To answer this question for Stokes flow and reactive diffusive transport through paper, we simulate flow through µ-CT-determined microstructures using physics-informed neural networks, computational fluid dynamics, and pore network modeling. We combine these simulations with statistical morphological analysis including dependency quantification to provide the relevance and dependence of structural properties in both transport processes. Our study suggests that the two transport scenarios do not rely on the same set of structural properties, even when fiber swelling due to moisture transport is considered.
Keywords: porous fibrous materials; transport; Stokes flow; pore network; physics informed neural networks