AUTHOR(S):

Charles Chalem, Marcel Obounou, Elkana Pemha, Clement Tchawoua

TITLE

Combined low-Reynolds-number k-ε model for recirculating flows

KEYWORDS

Turbulence, Low-Reynolds Number, k-ε model, Recirculating flow, Length of reattachment, Secondary flows, Finite volumes method.

ABSTRACT

The aim of this work is the numerical simulation of turbulent flow with separation and reattachments. In The present paper, the low-Reynolds-number (LRN) turbulence is combined with standard turbulence model using two different formulations for predicting the length of the reattachment point in the separated flow. The developed model is validated with Jovic and Driver (1994) backward facing step problem before being applied to the problem of recirculating flow over repeated square ribs. Performance of the models is investigated and compared with available experimental data, Direct Numerical Data and numerical results using other turbulence models. It is seen that the models provide good predictions of secondary flows beyond the step.

Cite this paper

Charles Chalem, Marcel Obounou, Elkana Pemha, Clement Tchawoua. (2016) Combined low-Reynolds-number k-ε model for recirculating flows. International Journal of Theoretical and Applied Mechanics, 1, 1-12