The unsteady vortical flows and separation-induced transition over a 2-bladed cycloidal rotor are investigated numerically at two advance coefficients, with special emphasis on the influence of different turbulence models, namely original SST k-? model ?-Re?t model. Firstly, applicability in predicting transitional single airfoil incidences is evaluated, main results show good agreement experim...

In this experimental study, flow over NACA 4412 airfoil with flexible membrane mounted both on suction surface and pressure was investigated at Reynolds number of 5x10 4 different angles attack. The smoke-wire visualization method used for to demonstrate phenomena as laminar separation bubble (LSB), leading edge tip vortices. A constant temperature anemometer (CTA) measuring the partially airfo...

Results are presented for the aerodynamic characteristics of NACA 0012 aerofoil section at Reynolds numbers of 2-88 x 106 and 1.44 x 10 6 with some indications of scale effect at other Reynolds numbers. The measurement of CLmax at a Reynolds number of 2-88 x 10 6 is uncertain for two reasons. On the one hand, a laminar separation bubble disappears intermittently for reasons that are not fully u...

One-way coupled Euler-Lagrangian simulations of bubbles in a spatially evolving turbulent boundary layer were performed. The simulation parameters were chosen to match an experiment by Sanders et al. (2006), though the Reynolds number of the boundary layer was lower than experiment. The bubbles were observed to migrate away from the wall, as observed in experiment. Budgets of the forces on the ...

Compressible large-eddy simulations of turbulent flow over a wall-mounted hump with active flow control are performedand comparedwithprevious experiments. Theflow is characterizedby the unsteady separationbefore the steep trailing edge, which naturally reattaches downstream of the hump to form an unsteady turbulent separation bubble. The lowMachnumber large-eddy simulation demonstrated a goodpr...

The airflow in the modeled glottal constriction was simulated by the solutions of the Navier-Stokes equations for laminar flow, and the corresponding Reynolds equations for turbulent flow in generalized, nonorthogonal coordinates using a numerical method. A two-dimensional model of laryngeal flow is considered and aerodynamic properties are calculated for both laminar and turbulent steady flows...

PURPOSE To describe a novel method of global cell viability assessment for Descemet membrane endothelial keratoplasty (DMEK) and the comparison of two contemporary methods of donor tissue preparation. METHODS DMEK transplants were prepared using two different methods: liquid bubble separation and manual peeling (n=8 each group). Samples were incubated with Hoechst, calcein-AM and ethidium hom...