We show that a single particle distribution for the D2Q13 lattice Boltzmann scheme can simulate coupled effects involving advection and diffusion of velocity and temperature. We consider various test cases: non-linear waves with periodic boundary conditions, a test case with buoyancy, propagation of transverse waves, Couette and Poiseuille flows. W...
International audience
A novel transport model is developed for a space conditioned by a cooled liquid desiccant dehumidification membrane ceiling (LDMC-C) and displacement ventilation DV in which the space is divided into three zones: an occupied cool with fresh air zone; an upper recirculation zone; and a ceiling adjacent boundary layer zone where the air is drawn at t...
International audience
Bentonite is used for landfill application because of its high sealing ability. Following the swelling phenomenon the water reacts with the bentonite and expands the solid particles. The voids are filled and this reduces permeability of the soil. However, the drawback is the long time needed to assess the hydraulic performance, whereas the engineer...
An experimental program is carried out to investigate the swelling properties of Na activated Ca-bentonite submitted to prehydration and polymer adding, using Free Swell Index (FSI). Three Na activated Ca-bentonite are used: S, T and V. Various concentrations (0.5, 1, 1.5 and 2%) of two polyelectrolyte polymers aremixed with bentonites to underline...
Current changes to the energy market, as well as an ambition to achieve decarbonation and highly energy efficient systems, will lead to a fundamental change in the way in which energy systems are designed and managed. In particular, the growth of renewable and renewed energy will introduce a level of design and management complexity with a greater ...
International audience
L’objectif du travail présenté ici est l’identification statistique inverse de paramètres décrivant les caractéristiques mécaniques de suspensions de train à grande vitesse à des fins de maintenance. Cette identification se fait par la comparaison de mesures accélérométriques en circulation et de résultats de simulation de dynamique ferroviaire du ...
The displacement field in rods can be approximated by using a Taylor–Young expansion in transverse dimension of the rod. These involve that the highest-order term of shear is of second order in the transverse dimension of the rod. Then we show that transverse shearing energy is removed by the fourth-order truncation of the potential energy and so w...
