Two-dimensional direct numerical simulation (DNS) databases of bluff-body-stabilized lean hydrogen flames representative complicated reactive–diffusive system are analysed using the combined approach computational singular perturbation (CSP) and tangential stretching rate (TSR) to investigate chemical characteristics in blow-off dynamics. To assess diagnostic approaches flame dynamics, Damköhle...

Articles you may be interested in A self-consistent model for the saturation dynamics of the vortex shedding around the mean flow in the unstable cylinder wake Study of the long-time dynamics of a viscous vortex sheet with a fully adaptive nonstiff method We develop a model to numerically study the dynamics of vortex streets in channel flows. Previous work has studied the vortex wakes of specif...

Numerical simulations for flow past a finite rectangular wing with NACA 0012 section at $Re=1000$ various semi-aspect ratios ( $0.25\le sAR \le 7.5$ ) over range of angles attack $0^{\circ }\le \alpha 14^{\circ }$ reveal streamwise vortices, which increase in strength and number to occupy an increasing spanwise extent $\alpha$ . They result non-monotonic variation local force coefficients incre...

In the present study, an experimental investigation was performed to characterize the vortex induced vibration (VIV) of a flexible cable in an oncoming shear flow. The VIV tests were conducted in a wind tunnel with a flexible cable model. It was found that, under different oncoming velocity profiles, the cable model behaved in single-mode and multi-mode VIVs. The displacement amplitudes of the ...

A known bifurcation scenario describing the development and interaction of Mode A and Mode B vortex shedding modes of a circular cylinder wake is extended to predict the Strouhal–Reynolds number profile over the three-dimensional transitions. The mode amplitudes are described by coupled Landau equations and, with frequency information being included by the addition of complex coefficients, the ...

Predictive capability of RANS and LES models to calculate incipient cavitation of water in a step nozzle is assessed. The RANS models namely, Realizable k-ɛ, SST k-ω and Reynolds Stress Model did not predict any cavitation, due to the limitation of RANS models to predict the low pressure vortex cores. LES WALE model was able to predict the cavitation by capturing the shear layer instability and...