Berlin 2024 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 44: Complex Fluids, Colloids, Micelles and Vesicles (joint session CPP/DY)
CPP 44.4: Vortrag
Donnerstag, 21. März 2024, 16:00–16:15, H 0110
Kinetics of phase separation inside complex random porous media — •Rounak Bhattacharyya1,2 and Bhaskar Sen Gupta1 — 1Department of Physics, Vellore Institute of Technology, Vellore, Tamil Nadu, India 632014 — 2Institute for Theoretical Physics and BioQuant, Heidelberg University, 69120 Heidelberg, Germany
The kinetics of phase separation of segregating fluid mixtures imbibed in porous media is an active field of research due to its great scientific interest and industrial applications. The subject is well understood in the case of ordered pores (e.g., cylindrical pore). But most of the real experimental porous systems are random in nature and are poorly understood. Experimental limitations come from the difficulties in probing the real space geometry using scattering experiments. Also, the theoretical and numerical studies are challenging because of the complex topology of the materials. At this meeting, we will present the findings of our study on the phase separation dynamics of segregating binary fluid mixtures inside random porous materials using large-scale molecular dynamics simulations. Different random porous structures are considered to understand the effect of pore morphology on the coarsening process. We find the existence of two different growth regimes and the crossover is related to the average diameter of random pores. The Porod law and Superuniversality hypothesis are also examined. Finally, the non-equilibrium aging dynamics and the corresponding scaling laws will be discussed for such systems.
Keywords: Phase separation; Porous media; Domain growth; Coarse graining; Molecular dynamics