An explicit algebraic turbulence model for buoyant

A new model for buoyancy driven flows is proposed. It couples an EARSM and an EAHFM aiming to reproduce the coupled effects of dynamics and thermics via the buoyancy terms. Two features of algebraic models are examined. The weak equilibrium assumption at the root of the algebraic model is investigated on a vertical plane channel flow. This hypothesis fails near the velocity maximum and close to the walls. The modeling of the redistribution term and the pressure scrambling term are analyzed on the same configuration. The new model is based on the Wallin and Johansson model for the EARSM and on the Wikstrom, Wallin and Johansson model for the EAHFM. The two models are extended to account for buoyancy. The coupling is performed by an iterative resolution of the models. This new model is close to the one developed by So, Jin and Gatski model but is easier to implement.