Krüger, T.; Varnik, F.; Raabe, D.: Second-order convergence of the deviatoric stress tensor in the standard Bhatnagar-Gross-Krook lattice Boltzmann method. Physical Review E 82 (025701) (2010)
Ayodele, S. G.; Varnik, F.; Raabe, D.: Effect of aspect ratio on transverse diffusive broadening: A lattice Boltzmann study. Physical Review E 80 (1), pp. 016304-1 - 016304-9 (2009)
Ayodele, S. G.; Varnik, F.; Raabe, D.: Transverse diffusive mixing of solutes in pressure driven microchannels: A Lattice Boltzmann study of the scaling laws. La Houille Blanche, International Water Journal 6, pp. 93 - 100 (2009)
Gross, M.; Varnik, F.; Raabe, D.: Fall and rise of small droplets on rough hydrophobic substrates. Europhysics Letters 88 (26002), pp. 26002-p1 - 26002-p6 (2009)
Varnik, F.; Raabe, D.: Scaling effects in microscale fluid flows at rough solid surfaces. Modeling and Simulation in Materials Science and Engineering 14, pp. 857 - 873 (2006)
Baschnagel, J.; Varnik, F.: Computer simulations of supercooled polymer melts in the bulk and in confined geometry. Journal of Physics: Condensed Matter 17 (32), pp. R851 - R953 (2005)
Varnik, F.; Bocquet, L.; Barrat, L.-J.: A study of the static yield stress in a binary Lennard-Jones glass. The Journal of Chemical Physics 120 (6), pp. 2788 - 2801 (2004)
Baschnagel, J.; Meyer, H.; Varnik, F.; Metzger, S.; Aichele, M.; Müller, M.; Binder, K.: Computer Simulations of Polymers close to Solid Interfaces: Some Selected Topics. Special Issue of Interface Science: Polymers at Interfaces 11, pp. 159 - 173 (2003)
Varnik, F.; Baschnagel, J.; Binder, K.; Mareschal, M.: Confinement effects on the slow dynamics of a supercooled polymer melt: Rouse modes and the incoherent scattering function. European Physical Journal E 12 (167) (2003)
In this project, we employ a metastability-engineering strategy to design bulk high-entropy alloys (HEAs) with multiple compositionally equivalent high-entropy phases.
Low dimensional electronic systems, featuring charge density waves and collective excitations, are highly interesting from a fundamental point of view. These systems support novel types of interfaces, such as phase boundaries between metals and charge density waves.
Oxides find broad applications as catalysts or in electronic components, however are generally brittle materials where dislocations are difficult to activate in the covalent rigid lattice. Here, the link between plasticity and fracture is critical for wide-scale application of functional oxide materials.
In this project we conduct together with Dr. Sandlöbes at RWTH Aachen and the department of Prof. Neugebauer ab initio calculations for designing new Mg – Li alloys. Ab initio calculations can accurately predict basic structural, mechanical, and functional properties using only the atomic composition as a basis.
The wide tunability of the fundamental electronic bandgap by size control is a key attribute of semiconductor nanocrystals, enabling applications spanning from biomedical imaging to optoelectronic devices. At finite temperature, exciton-phonon interactions are shown to exhibit a strong impact on this fundamental property.
Enabling a ‘hydrogen economy’ requires developing fuel cells satisfying economic constraints, reasonable operating costs and long-term stability. The fuel cell is an electrochemical device that converts chemical energy into electricity by recombining water from H2 and O2, allowing to generate environmentally-friendly power for e.g. cars or houses…
The project Hydrogen Embrittlement Protection Coating (HEPCO) addresses the critical aspects of hydrogen permeation and embrittlement by developing novel strategies for coating and characterizing hydrogen permeation barrier layers for valves and pumps used for hydrogen storage and transport applications.
In this project we study - together with the department of Prof. Neugebauer and Dr. Sandlöbes at RWTH Aachen - the underlying mechanisms that are responsible for the improved room-temperature ductility in Mg–Y alloys compared to pure Mg.