DOI: 10.1615/TSFP3
LARGE-EDDY SIMULATION OF THE TURBULENT FLOW IN DUCTS A STUDY OF HEATING AND CURVATURE EFFECTS
RÉSUMÉ
We first study the spatial development of turbulent flow inside a straight duct of square section: heating with a constant temperature is applied suddenly at a given downstream location of the duct. The downstream development of the thermal boundary layer is then studied and compared with the case of a fully developed flow within a heated duct. We investigate the influence of the heating on the flow structures such as low-speed streaks, ejections etc .. The use of curvilinear coordinates allows us to consider duct with more geometries and curvature effects are then studied. The case of a S-shape duct is considered exhibiting both convex and concave curvatures. We assist to the formation of Görtler type vortices and the influence of the heating is investigated.