A Method for the Control of the Coanda Effect

Assessment of CFD capability for prediction of the Coandă effect

“…It can be observed that both quantities tend to be under-predicted by the simulation. This trend has generally been found in previous work trying to simulate this set-up using 2D RANS [3,24]. For these particular quantities, the Curvature Correction does appear to permit some improvement.…”

“…To considerably reduce computational cost Reynolds-Averaged Navier-Stokes (RANS) equations are an alternative and are actually the standard for most industrial applications. Gross and Fasel [3] and Frunzulica et al [24] used 2D RANS to simulate the jet experiment for a variety of turbulence models (k − ω, k − ω SST, k − , Spalart-Allmaras...). Important differences were found depending on the model employed, but k − ω, k − ω SST and k − ω SST with Curvature Correction were capable of finding relatively accurate separation location and normalized velocity profiles.…”

“…When considering the results given by that model, it is therefore important to keep in mind that the validation of the code cannot be guaranteed. These two turbulence models appear as the most promising according to Frunzulica et al [24] and will, therefore, be the only ones considered.…”

“…For the prescribed velocity profile at the jet exit, it was decided not to rely on a top-hat velocity profile assumption as done by other authors [3,24], due to the importance of that profile for the development of the flow. Instead, the mean velocity profile given by Neuendorf and Wygnanski [6] for the calibration, was scaled to be at the desired jet velocity of 48m.s −1 and used as the velocity profile at the inlet.…”