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Kevin Wittkowski

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Related publications (4)

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Quasi-linear homogenization for large-inertia laminar transport across permeable membranes

Giuseppe Antonio Zampogna, Kevin Wittkowski

Porous membranes are thin solid structures that allow the flow to pass through their tiny openings, called pores. Flow inertia may play a significant role in several filtration flows of natural and engineering interest. Here, we develop a predictive macros ...

Cambridge University Press2024

Homogenization of Flows in Porous Membranes: A Journey Across Scales

Kevin Wittkowski

Porous media are solid structures perforated by a matrix of pores, which may let a fluid flow across them. Geometrically, we can classify them as "thin" if their thickness is comparable with the size of their pores, and "bulk" otherwise. These structures c ...

EPFL2025

Adjoint-aided Homogenisation for Flows Through Heterogeneous Membranes

François Gallaire, Edouard Boujo, Kevin Wittkowski

Porous membranes, like nets or filters, are thin structures that allow fluid to flow through their pores. Homogenisation can be used to rigorously link the flow velocity with the stresses on the membrane via several coefficients (e.g. permeability and slip ...

CAMBRIDGE UNIV PRESS2025

Homogenization theory captures macroscopic flow discontinuities across Janus membranes

Kevin Wittkowski, François Gallaire, Pier Giuseppe Ledda, Giuseppe Antonio Zampogna

Janus membranes, thin permeable structures with chemical and geometrical asymmetric properties, show great potential in industrial separation processes. Yet the link between the micro- and macro-scale behaviours of these membranes needs to be established r ...

Cambridge University Press2023