Some Specific Aspects Related To The Use Of The Artificial Compressibility Methods To Simulate Unsteady Flows

Mariovane Donini (1) , Fernando Fachini (1) , Cesar Cristaldo (2) , Pascal Bruel (3, 4, 5)

1 INPE - Instituto Nacional de Pesquisas Espaciais
2 UNIPAMPA - Federal University of Pampa
3 CNRS - Centre National de la Recherche Scientifique
4 LMAP - Laboratoire de Mathématiques et de leurs Applications [Pau]
5 CAGIRE - Computational AGility for internal flows sImulations and compaRisons with Experiments

The artificial compressibility method is applied to simulate non-reactive and reactive flows with incompressible and infinite-rate chemistry assumptions. To validate the implemented time-accurate approach, the resulting code is used to calculate three different flow regimes: an unsteady non-reactive flow past a circular cylinder, a steady diffusionTsuji flame and an unsteady buoyant diffusion flame.As expected, the results evidence the strong dependence of the convergence rate to the artificial compressibility factor. They also show the ability of this approach to describe the circular cylinder wake unsteadiness as well as the flame shape of the steady diffusion flame. In return, the correct prediction of the low frequency instability known to be featured by unsteady buoyant diffusion flames is presently out of reach of the present version of the methodology.

Mots clés: Tsuji configuration; Finite volume method; Buoyant diffusion flame; Inert wake

Domaines: Mécanique des fluides [physics.class-ph]

Mariovane Donini, Fernando Fachini, Cesar Cristaldo, Pascal Bruel. Some Specific Aspects Related To The Use Of The Artificial Compressibility Methods To Simulate Unsteady Flows. MHMT'20 - 5th World Congress on Momentum, Heat and Mass Transfer, Oct 2020, Lisbonne / Virtual, Pitcairn Islands. ⟨10.11159/CSP20.107⟩. ⟨hal-02965305⟩