Effect of numerical schemes on advection terms for large eddy simulation of inclined dense jets

Vafa, Narges; Azadi, Amin; Firoozabadi, Bahar

doi:10.1007/s10652-021-09818-1

Cited by 5 publications

(4 citation statements)

References 41 publications

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“…These are, mainly, LES cases where, in accordance with almost all other LES studies in the literature, geometrical parameters of the INBJs have been predicted very well using this approach. This has been the case even with those simulations with a considerable grid number differences (e.g., [49] used much fewer grid numbers than [46]).…”

Section: Model Constants and Calibrationsmentioning

confidence: 97%

“…Several studies have utilized Large-eddy simulation (LES) approach for simulating INBJs (e.g., [44][45][46][47][48][49]). These studies have demonstrated that LES can effectively predict the geometrical features of the flow, in good agreement with experimental data.…”

Section: Introductionmentioning

confidence: 99%

“…However, for the mixing parameters, LES results were often reported to be less accurate than the geometrical ones. Vafa et al [49] suggested that the discretization scheme of the convection terms significantly affects the accuracy of the mixing results.…”

Section: Introductionmentioning

confidence: 99%

“…Employing the regional turbulent Schmidt number (RTSN) approach, [42] reduced this underestimation to ∼ 14% at the return point for 45 • inclined dens jets. Vafa et al [49] addressed the problem of underestimation of dilution in LES by changing the discretization schemes for convective terms of the filtered momentum and scalar transport equations.…”

Section: Introductionmentioning

confidence: 99%

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Reynolds flux modeling; new numerical insights into inclined dense jets

et al. 2023

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This paper aims to provide a more detailed representation of the scalar flux modeling (SFM) approach for modeling turbulent inclined negatively buoyant jets. The SFM approach addresses the limitations of eddy viscosity models in terms of the mean concentration field and turbulent scalar flux within the context of Reynolds-averaged Navier-Stokes modeling. In this study, the contribution of the involved terms in the transport equation of the turbulent scalar flux vector was evaluated, and the geometrical and mixing parameters of concentration and velocity of 45 • inclined negatively buoyant jets were verified. The SFM approach, along with the required modification for momentum flux modeling, was implemented in OpenFOAM v6. Results showed that the SFM approach can accurately predict mixing parameters due to the complex interactions between different turbulence contributors of the flow involved in the model. In comparison to simpler approaches, such as gradient-type models, that only correlate the gradient of the scalar field with turbulence, the SFM approach's capability to predict mixing parameters is significantly higher.

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Section: Model Constants and Calibrationsmentioning

confidence: 97%