Dresden 2026 – wissenschaftliches Programm
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DY: Fachverband Dynamik und Statistische Physik
DY 44: Poster: Active Matter, Soft Matter, and Fluids
DY 44.16: Poster
Mittwoch, 11. März 2026, 15:00–18:00, P5
Evaporation Induced Salt Precipitation in Porous Media: A Lattice Boltzmann Approach — •Alexander Reinauer1, Louis Oberer1, Alexander Schlaich2, and Christian Holm1 — 1Institute for Computational Physics, Stuttgart, Germany — 2Institute for Physics of Functional Materials, Hamburg University of Technology, Hamburg, Germany
We present a lattice Boltzmann model for simulating coupled evaporation and salt precipitation in porous media. The approach integrates Shan-Chen multiphase flow with a volume-based discretization of salt transport and incorporates a precipitation rule, which converts fluid cells into solid crystals once the local concentration exceeds a crystallization threshold.
The model is validated by reproducing analytical predictions for crystal growth. Besides, it features a tunable evaporation rate, enabling pore-scale studies of evaporation-induced salt precipitation. Investigations of the wettabilities of both the salt and the porous matrix reveal a pronounced impact on precipitation patterns. The simulations show distinct shifts in pore-clogging behavior depending on the relative wetting properties, with highly wetting crystals causing the strongest clogging and the slowest evaporation, arising from how wetting influences the spatial distribution of precipitation.
Keywords: Precipitation; Lattice Boltzmann; Porous Media
