Turbulence is a complex nonlinear and multi-scale phenomenon. Although the fundamental underlying Navier-Stokes equations have been known for two centuries, it remains extremely challenging to extract from them statistical properties of turbulence. Therefore, practical purpose, sustained effort has devoted obtaining some effective description turbulence, that we may call turbulence modelling, o...

Yasir Iqbal, ∗ Ronny Thomale, † Francesco Parisen Toldin, ‡ Stephan Rachel, § and Johannes Reuther 4, ¶ Institute for Theoretical Physics and Astrophysics, Julius-Maximilians University of Würzburg, Am Hubland, D-97074 Würzburg, Germany Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden, Germany Dahlem Center for Complex Quantum Systems and Fachbereich Physik, Fre...

für Naturforschung in cooperation with the Max Planck Society for the Advancement of Science under a Creative Commons Attribution 4.0 International License. Dieses Werk wurde im Jahr 2013 vom Verlag Zeitschrift für Naturforschung in Zusammenarbeit mit der Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. digitalisiert und unter folgender Lizenz veröffentlicht: Creative Commons Namen...

We study the growth of a crystal in presence of a correlated disorder on the substrate. Using functional renormalization group, we show, for a long range disorder correlation, an initial decay of the KPZ type nonlinearity, though over a large length scale the behavior can be governed by the nonlinearity.

Toluene and benzene were eliminated using multi-walled carbon nanotubes (MWCNTs). In order to investigate influence of acid treatment on the MWCNTs adsorption capacities, the MWCNTs were functionalized by nitric acid (10 M) under reflux conditions for 2 h. Fourier transform infrared (FTIR) and Raman spectroscopy were employed to confirm the formation of functional groups on the nanotubes su...

In this study, Santa Barbara Amorphous (SBA-15) mesoporous silica has been functionalized with aminopropyl groups that were converted to propargyl-bearing moieties through the reaction with propargyl bromide. The material then underwent an efficient Cu(I)-catalyzed azide alkyne click reaction with sodium azide in order to obtain the corresponding triazole products. The covalent modification of ...

DRIFTS, was used to study small organic molecules, with and without functional groups, adsorbed to the surface of γ-alumina and kaolinite clay from a non-polar solvent. Adsorbed water is present on the surface of both minerals and this influences the adsorption of organic molecules from, the non-polar solvent, onto the mineral surface, particularly the interaction of polar functional groups wit...