INVESTIGADORES
NIGRO Norberto Marcelo
artículos
Título:
Numerical aspects of Eulerian gas-particles flow formulations
Autor/es:
VENIER CESAR; MARQUEZ DAMIAN, SANTIAGO; NIGRO NORBERTO
Revista:
COMPUTERS & FLUIDS
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2016
ISSN:
0045-7930
Resumen:
p { margin-bottom: 0.25cm; line-height: 120%; }An Euleriantwo-fluid numerical solver with kinetic-frictional theory for gran-ular flows has beenimplemented in the open source code platform OpenFOAM R .Once validated withstandard gas-particle tests, the solver is used to investigateseveral aspects ofthe numerical treatment. Among these, the maximum packingand phasedisappearing limits, the phase accumulation with a flux-correctedtrans-port integrator, thecell-face fields interpolation and reconstruction practices, thedrag couplingapproaches and the different levels of conservativeness of the mo-mentum equations arediscussed. The last two topics are studied in depth. First,the fully implicittreatment and partial elimination algorithm are implementedand its convergencefeatures are investigated. Then, different levels of conserva-tiveness of themomentum equations are considered by presenting three formula-tions of theadvective term (the conservative form, the nonconservative form andthe phase-intensiveform). The impact of each formulation on the velocity fieldprediction isquantified for a shallow water problem and then extended to two-dimensionalgas-liquid and gas-particle systems. The conservative form predictsmore accurateresults against the other two formulations on free-evolving inertiacdominated problems with sharp changes on the velocity field. However,no sig-nificant differencesare observed between the conservative and nonconservativeformulations, whenthe interest is focused on macroscopic behaviors, such as thetime-averagedparticles distribution on a bubbling fluidized bed.