Coupled modeling and numerical simulation of gas flows laden with solid particles in de Laval nozzles

Zhang, Lite; Yu, Q.; Liu, T.; Feng, Zilong; Sun, Mengyu; Jin, Haozhe

doi:10.1007/s00193-021-01063-1

Cited by 7 publications

(2 citation statements)

References 24 publications

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“…In order to balance the contradiction between the computational volume and the coupling between phases, this paper adopts the mass-point method in the Eulerian-Lagrangian framework, i.e., the gas phase follows the Eulerian description of the continuous fluid while the discrete phase of the solid particles adopts the Lagrangian description, while the corresponding number of real particles is characterized by the "computational particles" (points with a certain mass). For the scaled nozzle gas-solid two-phase flow, based on the EL framework, the gas-phase SST k-ω turbulence model and the particle random orbit model are used, and the established gas-solid two-phase coupled model has sufficient accuracy in the numerical simulation [15]. In addition, most of the relevant studies dealt only with monodisperse particles, and only a few models and simulations considered the polydispersity of the particles.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of Primary Nozzle Geometry on Supersonic Gas-Solid Jet of Bypass Injected Dry Powder Fire Extinguishing Device

Zhang,

Feng,

et al. 2024

Fire

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A two-way coupled model between polydisperse particle phases with compressible gases and a density-based coupling implicit solution method, combining the third-order MUSCL with QUICK spatial discretization scheme and the second-order temporal discretization scheme, are constructed based on the discrete-phase model (DPM) and the stochastic wander model (DRWM) in the Eulerian–Lagrangian framework in conjunction with a unitary particulate source (PSIC) approach and the SST k-ω turbulence model. The accuracy of the numerical prediction method is verified using previous supersonic nozzle gas-solid two-phase flow experiments. Numerical simulation of a two-phase jet of dry powder extinguishing agent gas with pilot-type supersonic nozzle was performed to analyze the influence of geometrical parameters, such as the length ratio rL and the area ratio rA of the main nozzle on the two-phase flow field, as well as on the jet performance indexes, such as the particle mean velocity vp,a, velocity inhomogeneity Φvp, particle dispersion Ψp, particle mean acceleration ap,a, etc. By analyzing the parameters, we indicate the requirements for the combination of jet performance metrics for different flame types such as penetrating, spreading, and dispersing.

show abstract

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of Primary Nozzle Geometry on Supersonic Gas-Solid Jet of Bypass Injected Dry Powder Fire Extinguishing Device

Zhang,

Feng,

et al. 2024

Fire

Self Cite

View full text Add to dashboard Cite

show abstract

“…In order to balance the contradiction between the computational volume and the coupling between phases, this paper adopts the mass-point method in the Eulerian-Lagrangian framework, i.e., the gas phase follows the Eulerian description of the continuous fluid while the discrete phase of the solid particles adopts the Lagrangian description, and the corresponding number of real particles is characterized by the "computational particles" (points with a certain mass). For the scaled nozzle gas-solid two-phase flow, based on the EL framework, the gas-phase SST k-ω turbulence model and the particle random orbit model are used, and the established gas-solid two-phase coupled model has sufficient accuracy in the numerical simulation [14]. In addition, most of the relevant studies dealt only with monodisperse particles, and only a few modeling and simulations considered the polydispersity of the particles.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of the Effect of Primary Nozzle Geometry on Supersonic Gas-Solid Jet of Bypass Injected Dry Powder Fire Extinguishing Device

Zhang,

Feng,

et al. 2024

Preprint

View full text Add to dashboard Cite

A two-way coupled model between polydisperse particle phases with compressible gases and a density-based coupling implicit solution method combining the third-order MUSCL with QUICK spatial discretization scheme and the second-order temporal discretization scheme are constructed based on the discrete-phase model (DPM) and the stochastic wander model (DRWM) in the Eu-lerian-Lagrangian framework in conjunction with a unitary particulate source (PSIC) approach and the SST k-ω turbulence model. The accuracy of the numerical prediction method is verified using previous supersonic nozzle gas-solid two-phase flow experiments. Numerical simulation of two-phase jet of dry powder extinguishing agent gas with pilot-type supersonic nozzle was carried out to analyze the influence of geometrical parameters such as length ratio rL and area ratio rA of main nozzle on the two-phase flow field as well as on the jet performance indexes such as particle mean velocity vp,a, velocity inhomogeneity Φvp, particle dispersion Ψp, particle mean acceleration ap,a and so on. By analyzing the parameters, we indicate the requirements for the combination of jet performance metrics for different flame types such as penetrating, spreading, and dispersing.

show abstract

Design and characteristic analysis of flame cutting nozzles for ultralarge-thickness steel ingots

Yu,

Liu,

Wang

et al. 2024

Arabian Journal of Chemistry

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Coupled modeling and numerical simulation of gas flows laden with solid particles in de Laval nozzles

Cited by 7 publications

References 24 publications

Numerical Study of the Effect of Primary Nozzle Geometry on Supersonic Gas-Solid Jet of Bypass Injected Dry Powder Fire Extinguishing Device

Numerical Study of the Effect of Primary Nozzle Geometry on Supersonic Gas-Solid Jet of Bypass Injected Dry Powder Fire Extinguishing Device

Numerical Study of the Effect of Primary Nozzle Geometry on Supersonic Gas-Solid Jet of Bypass Injected Dry Powder Fire Extinguishing Device

Design and characteristic analysis of flame cutting nozzles for ultralarge-thickness steel ingots

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