Large eddy simulation of a round jet into a counterflow

Li, Zhiwei; Huai, Wenxin; Zhou, Qian

doi:10.1007/s11431-012-5093-1

Cited by 19 publications

(3 citation statements)

References 18 publications

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“…1. This configuration is inspired from the flow configuration of Li et al (2013). A Cartesian coordinate system was chosen, making the center of the jet exit its origin.…”

Section: Flow Configuration and Boundary Conditionsmentioning

confidence: 99%

“…However, Sivapragasam et al (2010) investigated experimentally and computationally turbulent jet in annular counterflow stream for a given annular-to-jet diameter ratio and various jet-to-counterflow mass flow ratios. More recently, Li et al (2013) used large eddy simulation (LES) to investigate round jet discharging in counterflow. They derived from instantaneous vortex and streamlines, taken at several times, that there existed many vortices near the stagnation point owing to the presence of counterflow stream.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical study of turbulent round jet in a uniform counterflow using a second order Reynolds Stress Model

Amamou

Habli

Saïd

et al. 2015

Journal of Hydro-environment Research

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“…1. This configuration is inspired from the flow configuration of Li et al (2013). A Cartesian coordinate system was chosen, making the center of the jet exit its origin.…”

Section: Flow Configuration and Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical study of turbulent round jet in a uniform counterflow using a second order Reynolds Stress Model

Amamou

Habli

Saïd

et al. 2015

Journal of Hydro-environment Research

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“…LES has been widely accepted as a promising numerical tool for solving the large-scale unsteady behavior of complex turbulent flow [20][21][22][23][24]. Encouraging results have been reported in the recent literatures and demonstrate the capability of LES to account for the generation and evolution of large-scale structures in turbulent swirling flow [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Large eddy simulation of unconfined turbulent swirling flow

Zhang

Han

et al. 2015

Sci. China Technol. Sci.

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Large eddy simulations (LES) were performed to study the non-reacting flow fields of a Cambridge swirl burner. The dynamic Smagorinsky eddy viscosity model is used as the sub-grid scale turbulence model. Comparisons of experimental data show that the LES results are capable of predicting mean and root-mean-square velocity profiles. The LES results show that the annular swirling flow has a minor impact on the formation of the bluff-body recirculation zone. The vortex structures near the shear layers, visualized by the iso-surface of Q-criterion, display ring structures in non-swirling flow and helical structures in swirling flow near the burner exit. Spectral analysis was employed to predict the occurrence of flow oscillations induced by vortex shedding and precessing vortex core (PVC). In order to extract accurately the unsteady large-scale structures in swirling flow, a three-dimensional proper orthogonal decomposition (POD) method was developed to reconstruct turbulent fluctuating velocity fields. POD analysis reveals that flow fields contain co-existing helical and toroidal shaped coherent structures. The helical structure associated with the PVC is the most energetic dynamic flow structure. The latter toroidal structure associated with vortex shedding has lower energy content which indicates that it is a secondary structure. Cambridge swirl burner, large eddy simulation, proper orthogonal decomposition, vortex shedding and breakdown, precessing vortex core Citation: Zhang H D, Han C, Ye T H, et al. Large eddy simulation of unconfined turbulent swirling flow.

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