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Characterization of Planetary Atmospheres
Karan Molaverdikhani
Fri, 21 Jun 2019, 15:00
Fundamental Physics with High-Energy Cosmic Neutrinos
Dr. Mauricio Bustamante
Mon, 24 Jun 2019, 16:30
Lynton Ardizzone
Tue, 25 Jun 2019, 14:15

Gradient dynamics models for films of complex fluids and beyond - dewetting, line deposition and biofilms

Uwe Thiele , University of Münster
After briefly reviewing a number of experiments on dewetting and evaporating thin films/drops of simple and complex liquids, I introduce the concept of a gradient dynamics description of the evolution of interface-dominated films and drops on solid substrates. First, the case of films/drops of simple non-volatile liquid is discussed, and illustrated with results on droplet patterns and sliding droplets. As a further example, the diffusion equation is formulated as a gradient dynamics. The obtained elements are combined into a thermodynamically consistent gradient dynamics formulation for films of mixtures and surfactant suspensions [1,2]. Next, such models are employed to investigate the out-of-equilibrium process of the deposition of line patterns at receding contact lines for evaporatively dewetting solutions/suspensions [3] and in Langmuir Blodgett transfer [4]. Finally, I discuss how to combine the presented thin-film dynamics with bioactive elements to obtain models for the osmotic spreading of biofilms growing on moist agars [5]. I conclude with a summary and outlook. [1] U. Thiele, D. Todorova, H. Lopez, Phys. Rev. Lett. 111, 117801 (2013) [2] Thiele, U.; Archer, A.Pismen, L., Phys. Rev. Fluids 1, 083903 (2016). [3] U. Thiele, Advances in Colloid and Interface Science 206, 399-413 (2014). [4] M.H. Köpf and U. Thiele, Nonlinearity 27, 2711-2734 (2014). [5] Trinschek, S.; John, K.; Lecuyer, S., Thiele, U., Phys. Rev. Lett. 119, 078003 (2017). [6] Trinschek, S.; John, K. Thiele, U., Soft Matter 14, 4464-4476 (2018)
Theorie komplexer Systeme
10 Jan 2019, 14:15
Institut für Theoretische Physik, Phil19

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