Showing papers by "W.P. Jones published in 2009"
TL;DR: In this paper, the LES-Lagrangian particle methodology is applied to the study of vaporizing particle laden flows and a probabilistic description of the liquid phase is adopted and stochastic models for the filtered Lagrangian rates of change of droplet mass and temperature of the spray are presented.
48 citations
TL;DR: In this article, the Eulerian Stochastic Field method was applied to the solution of the sub-grid joint-scalar probability density function of the reacting scalars in the Large Eddy Simulations (LES) context.
Abstract: This work deals with pre-vaporized n-heptane auto-ignition in turbulent flows. The paper applies the Eulerian Stochastic Field method to the solution of the sub-grid joint-scalar probability density function (PDF) of the reacting scalars in the Large Eddy Simulations (LES) context. A reduced mechanism of 22 species and 18 reactions is used to model n-heptane chemical kinetics. The method is able to reproduce the different regimes observed experimentally and studies the influence of inflow temperature fluctuations.
43 citations
TL;DR: Differences in LES and RANS for the particular flow considered are not large, however, and this may be attributed to the significant effort already expended in the development of second-moment turbulence closures with wall reflection effects for impinging flow application.
36 citations
TL;DR: It is demonstrated, using multimodal imaging, that it can not only track BMSCs but also establish their effects in a pre-clinical model of Parkinson's disease.
31 citations
31 Dec 2009
TL;DR: In this article, the Eulerian stochastic field method of solving the pdf equation is used to model combustion processes with high-levels of extinction and reignition, and the results show that the LES-pdf formulation can capture different regimes without any parameter adjustments.
Abstract: Recently there is has been increased interest in modelling combustion processes with high‐levels of extinction and re‐ignition. Such system often lie beyond the scope of conventional single scalar‐based models. Large Eddy Simulation (LES) has shown a large potential for describing turbulent reactive systems, though combustion occurs at the smallest unresolved scales of the flow and must be modelled. In the sub‐grid Probability Density Function (pdf) method approximations are devised to close the evolution equation for the joint‐pdf which is then solved directly. The paper describes such an approach and concerns, in particular, the Eulerian stochastic field method of solving the pdf equation. The paper examines the capabilities of the LES‐pdf method in capturing auto‐ignition and extinction events in different partially premixed configurations with different fuels (hydrogen, methane and n‐heptane). The results show that the LES‐pdf formulation can capture different regimes without any parameter adjustments...
10 citations