T&TWinner, la chimie et les propriétés de transports en ligne, dans l'intervalle de 300 K à 20 000 K

Abstract

Depuis 1992, le SPCTS propose en téléchargement sur le réseau Internet (autrefois Minitel) la base de données et de calculs thermochimiques T&TWinner (Thermodynamique & Transport sous Windows). Ce logiciel convivial et ergonomique permetà tous de simuler les réactions chimiquesà l'équilibre thermodynamique. Les algorithmes de calculs utilisés, ontété choisis en raison de leurs robustesse, précision et rapidité afin d'évaluer les propriétés thermodynamiques de systèmes complexes ou les coefficients de transport de la phase gazeuse. Ceux-ci estiment ainsi de façon particulièrement performante les nombres de moles d'espèces extrêmement minoritaires, ce qui est précieux pour prévoir la présence de traces toxiques dans les processus de synthèse chimique ou de pyrolyse. Un bilan de flux de grandeurséchangées peutêtre effectué, après le calcul des coefficients des grandeurs de transport. Ainsi la viscosité représente leséchanges de quantité de mouvement, la diffusion représente leséchanges de matière et la conductivité thermique leś echanges de chaleur.

Assessment of Carbon Dioxide Dissociation as a New Route for Syngas Production: A Comparative Review and Potential of Plasma-Based Technologies

“…The thermal decomposition of CO 2 by dissociative excitation has been studied using the T&TWinner software, based on the minimization of the Gibbs free energy. 44 Figure 2 shows that, from a thermodynamic point of view, CO 2 dissociates at high temperature into carbon monoxide and oxygen with no precipitation of carbon. However, the main limitation is the reaction kinetics.…”

Exhaust Gas Fuel Reforming of Diesel Fuel by Nonthermal Arc Discharge for NOx Trap Regeneration Application

“…However, the relevance of a combustion kinetic mechanism has been proven by Benilov and Naidis for low current arc discharge . The mechanism has been first tested numerically in exhaust gas fuel reforming conditions in a plug flow reactor (PFR) for a very long time (∼10 8 s) and then has been compared to a thermodynamic model based on the T&TWinner database. The results with the n -heptane kinetic mechanism from Curran et al were consistent with the thermodynamic model.…”

Lattice Boltzmann Method Computation of Turbulent High-Temperature Plasma Jets

“…The nozzle front face AB of the torch sizes 12mm. The Jets & Poudres [12] results are among others used to validate the present LB results either for the plasma jet or the powders dynamics and heating. In the solution procedure, the LB background, the turbulence modeling and the LB-physical conversion platform are considered and the thermo-physical properties temperaturevariation is fully accounted-for in our model [13].…”

“…To show the validity of the proposed procedure of conversion and the novelty against others LB attempts to simulate this complex thermal flow, a validation analysis based on a free jet was performed. The centerline velocity and temperature profiles were compared to former predictions and measurements [12,[14][15][16]. The predicted results for the centerline axial velocity and temperature field are plotted in Fig.…”