I h e interaction of a dense spray diffusion flame with a non-decaying potential vortex has been investigated theoretically. A similwity solution for the local ~tmctiire of the diffusion flamelet in the vortex field has been determined. The global diffusion flame contour generated by the vortcx has been determined by patching the flamelet solutions at different distances from the vortex center ...

The effect of inlet swirl on the flow development and combustion dynamics in a lean-premixed swirl-stabilized combustor has been numerically investigated using a large-eddy-simulation (LES) technique along with a level-set flamelet library approach. Results indicate that when the inlet swirl number exceeds a critical value, a vortex-breakdown-induced central toroidal recirculation zone is estab...

Different variants for buoyancy-affected terms in k-ε turbulence model have been utilized to predict the flow parameters more accurately, and investigate applicability of alternative k-ε turbulence buoyant closures in numerical simulation of a horizontal gravity current. The additional non-isotropic turbulent stress due to buoyancy has been considered in production term, based on Algebraic Stre...

The anticipated upscaling of hydrogen energy applications will involve the storage and transport at cryogenic conditions. Understanding potential hazard arising from leaks in high-pressure is needed to improve safety. manuscript reports a series numerical simulations with detailed chemistry for transient evolution ignited jets. study aims gain insight ignition processes, flame structures dynami...

We study the competition between domain coarsening in a symmetric binary mixture below critical temperature and turbulent fluctuations. We find that the coarsening process is arrested in the presence of turbulence. The physics of the process shares remarkable similarities with the behavior of diluted turbulent emulsions and the arrest length scale can be estimated with an argument similar to th...

To explore the character of the underlying transport in plasma turbulence, we have followed the motion of pseudo-particle tracers during the nonlinear evolution of three-dimensional turbulence models. These calculations have been performed for three different turbulence models and are associated with resistive interchange, resistive ballooning, and ηi modes, respectively. The finite-scale Lyapu...

via Rate-Controlled Constrained Equilibrium S. Rigopoulos , S. Navarro-Martinez , 1 School of Mechanical, Aerospace and Civil Engineering, University of Manchester, UK 2 Department of Mechanical Engineering, Imperial College London, UK Abstract The objective of this paper is the simulation of a turbulent lifted flame via employing Rate-Controlled Constrained Equilibrium (RCCE) for the chemistry...