CIMEC   24726
CENTRO DE INVESTIGACION DE METODOS COMPUTACIONALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
A Particle-Based Method for the Solution of Turbulent Fluid Flows
Autor/es:
NIGRO NORBERTO; RYZHAKOV PAVEL; LARRETEGUY AXEL; IDELSOHN, SERGIO; GIMENEZ JUAN
Lugar:
Tucuman
Reunión:
Congreso; MECOM 2018; 2018
Institución organizadora:
AMCA
Resumen:
In this work a new model for analysis of incompressible massively unstable flows is presented.It relies on resolving all the instabilities at all scales without any additional model, i.e.following the Direct Numerical Simulation style. Nevertheless, the computation is carriedout at two levels: the coarse one and the fine one. The fine scale simulation is performedon the Representative Volume Elements (RVEs) providing the inertial stress tensor as afunction of some dimensionless numbers characterizing the flow. Consequently, the turbulenteffects are transferred to the coarse mesh as a Reynolds stress tensor without any associationwith the strain rate tensor of the coarse mesh as is normally imposed by the Boussinesqhypothesis in most turbulence modeling. The idea behind generating a new way of modelingthe turbulence that is capable of breaking with the current deficiencies of most models restson the possibility of generating reduced models for the RVEs through simulations carriedout off-line. An example showing the potentiality of this methodology for homogeneousturbulent flows such as the mixing layer flow is presented.