Article dans une revue avec comité de lecture

Note on the turbulence transition threshold of a buoyancy-driven flow over an isothermal vertical wall
WSEAS Transactions on Heat and Mass Transfer, Vol. 2, Issue 1, p. 1-5, ISSN : 1790-5044, 2007.

par   Catalin Viorel POPA , Stéphane FOHANNO , Guillaume POLIDORI

Résumé :

Abstract :

The integral formalism has been developped in an attempt to predict the mathematical transition threshold from laminar to turbulent regimes in a free convection boundary-layer flow adjacent to an isothermal vertical wall and also to gain a better understanding in the prediction of the turbulence mechanism. The transition threshold is approached herein as the intersection of the two fully developped laminar and turbulent flow regimes. As earlier shown for the uniform heat flux condition, the transition for the isothermal wall condition is also Prandtl number dependent and occurs differently depending on whether the dynamical or thermal viewpoints are considered. A change in the transition threshold behaviour is observed at Pr = 20.

Thématique du GRESPI concernée par cet article :