Jets are one of the most fascinating topics in fluid mechanics. For aeronautics, turbulent jet-noise modelling is particularly challenging, not only because of the poor understanding of high Reynolds number turbulence, but also because of the extremely low acoustic efficiency of high-speed jets. Turbulent jet-noise models starting from the classical Lighthill acoustic analogy to state-of-the ar...

The thermo-hydraulic behavior of the air flow over a two dimensional ribbed channel wasnumerically investigated in various rib-width ratio configurations (B/H=0.5-1.75) atdifferent Reynolds numbers, ranging from 6000 to 18000. The capability of differentturbulence models, including standard k-ε, RNG k-ε, standard k-ω, and SST k-ω, inpredicting the heat transfer rate was compared with the experi...

This article reports the results of research on application turbulent model to fluid flow in cavities. was developed using kinetic energy equation k, dissipation ɛ and temperature variance θ2 applying damping function f. While equations about tensor stress vector heat flux are formulated algebraically. simulation is carried out at Rayleigh number Ra = 5 x 1010. applied a three-dimensional cavit...