Soret separation in a binary liquid mixture near its critical temperatureThe European Physical Journal E - Tập 37 - Trang 1-6 - 2014
J. C. Legros, Yu. Gaponenko, T. Lyubimova, V. Shevtsova
The values of transport coefficients near a critical point are typically enhanced compared to the values in the classical region far away from a critical point. We report on the impact of the asymptotic behavior of the mass diffusion near the critical region on the Soret separation of the components in a model binary mixture. Concentration patterns are numerically investigated in the case of a spa...... hiện toàn bộ
Dip coating in the presence of an opposing Marangoni stressThe European Physical Journal E - Tập 40 - Trang 1-6 - 2017
Sumit Gupta, Naveen Tiwari
Theoretical analysis of the dip coating process of uniformly wetting and selectively wetting substrates with a shear-thinning power-law fluid is presented. The viscosity is modeled by a three-constant Ellis model that allows for Newtonian and power-law fluids at low and high shear, respectively. The effect of an opposing Marangoni stress is studied on the entrained film thickness. Ellis number and...... hiện toàn bộ
Water jet indentation for local elasticity measurements of soft materialsThe European Physical Journal E - Tập 39 - Trang 1-11 - 2016
N. R. Chevalier, Ph. Dantan, E. Gazquez, A. J. M. Cornelissen, V. Fleury
We present a novel elastography method for soft materials (100Pa-100kPa) based on indentation by a μm-sized water jet. We show that the jet creates a localized deformation (“cavity”) of the material that can be easily visualized. We study experimentally how cavity width and depth depend on jet speed, height, incidence angle and sample elasticity. We describe how to calibrate the indenter using gel...... hiện toàn bộ
Rheology and aging: A simple approachThe European Physical Journal E - Tập 4 - Trang 355-361 - 2001
C. Derec, A. Ajdari, F. Lequeux
We introduce a rheological model to describe the low-frequency mechanical properties of systems near a fluid/paste transition. We propose a Landau-like expansion for the vicinity of this transition, treating the stress relaxation rate as an order parameter. This leads to a formally simple model that allows us to describe the interplay between aging and non-linearities in the mechanical response of...... hiện toàn bộ
Pattern formation in bubbles emerging periodically from a liquid free surfaceThe European Physical Journal E - Tập 33 - Trang 11-18 - 2010
H. N. Yoshikawa, C. Mathis, P. Maıssa, G. Rousseaux, S. Douady
Patterns formed by centimeter scale bubbles on the free surface of a viscous liquid are investigated in a cylindrical container. These bubbles emerge periodically at the surface and interact with each other in the central zone. Their radial emission, due to interaction and radial surface flow, leads to the formation of a variety of patterns. Different star-like and spiral patterns appear spontaneo...... hiện toàn bộ
An analytical approach to the rise velocity of periodic bubble trains in non-Newtonian fluidsThe European Physical Journal E - Tập 16 - Trang 29-35 - 2005
X. Frank, H. Z. Li, D. Funfschilling
The present study aims at providing insight into the acceleration mechanism of a bubble chain rising in shear-thinning viscoelastic fluids. The experimental investigation by the Particle Image Velocimetry (PIV), birefringence visualisation and rheological simulation shows that two aspects are central to bubble interactions in such media: the stress creation by the passage of bubbles, and their rel...... hiện toàn bộ
Dynamics of water in molecular sieves by dielectric spectroscopyThe European Physical Journal E - Tập 12 - Trang 51-54 - 2003
H. Jansson, J. Swenson
We present recent dielectric data on the dynamics of water confined in molecular sieves with pore sizes 5 and 10 Å. The dielectric measurements in the frequency and temperature ranges 10-2-106 Hz and 120–300 K show three relaxation processes for both samples. In the case of the 10 Å pore the slowest process shows an Arrhenius temperature dependence at low temperatures (<220 K), while at high tempe...... hiện toàn bộ