Numerical modeling of $$30^{\circ }$$ 30 ∘ and $$45{^\circ }$$ 45 ∘ inclined dense turbulent jets in stationary ambient

Gildeh, Hossein Kheirkhah; Mohammadian, Abdolmajid; Nistor, Ioan; Qiblawey, Hazim

doi:10.1007/s10652-014-9372-1

Cited by 61 publications

(35 citation statements)

References 35 publications

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“…Ref. [24] found that of the turbulence models tested in their study, the realizable k-ε and LRR models were more accurate than the other three tested. Tables 2 and 3 (after [24]) summarize the results for these two models (only presented 30 • jets for the sake of brevity).…”

Section: Discharge Through Inclined Dense Jetsmentioning

confidence: 90%

“…Ref. [24] used OpenFOAM to explore the numerical modeling of 30 • and 45 • inclined dense jets in calm ambient water conditions. OpenFOAM has a solid structure of various solvers, including a wide range of turbulence models that could be used to the jet mixing and dispersion analysis.…”

Section: Discharge Through Inclined Dense Jetsmentioning

confidence: 99%

“…Ref. [24] discretized the temporal term with a first-order implicit Euler scheme. The standard finite volume method with a Gaussian integration was used to discretize the advection-diffusion terms.…”

Section: Discharge Through Inclined Dense Jetsmentioning

confidence: 99%

“…While the discharge rises close to the nozzle, negative buoyancy forces affect the upward momentum and decrease it until they dominate the concentration transport (somewhere after the discharge rise peak) and the maximum concentration profile sinks down toward the bed faster than the velocity maximum profile. The centerline results in [24] were extracted following the maximum cross-sectional velocity similar to [40].…”

Section: Discharge Through Inclined Dense Jetsmentioning

confidence: 99%

See 3 more Smart Citations

CFD Modeling of Effluent Discharges: A Review of Past Numerical Studies

Mohammadian

Gildeh

Nistor

2020

Water

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Effluent discharge mixing and dispersion have been studied for many decades. Studies began with experimental investigations of geometrical and concentration characteristics of the jets in the near-field zone. More robust experiments were performed using Laser-Induced Fluorescence (LIF) and Particle Image Velocimetry (PIV) systems starting in the 20th century, which led to more accurate measurement and analysis of jet behavior. The advancement of computing systems over the past two decades has led to the development of various numerical methods, which have been implemented in Computational Fluid Dynamics (CFD) codes to predict fluid motion and characteristics. Numerical modeling of mixing and dispersion is increasingly preferred over laboratory experiments of effluent discharges in both academia and industry. More computational resources and efficient numerical schemes have helped increase the popularity of using CFD models in jet and plume modeling. Numerous models have been developed over time, each with different capabilities to facilitate the investigation of all aspects of effluent discharges. Among these, Reynolds-averaged Navier-Stokes (RANS) and Large Eddy Simulations (LES) are at present the most popular CFD models employing effluent discharge modeling. This paper reviews state-of-the-art numerical modeling studies for different types and configurations of discharges, including positively and negatively buoyant discharges, which have mostly been completed over the past two decades. The numerical results of these studies are summarized and critically discussed in this review. Various aspects related to the impact of turbulence models, such as k-ε and Launder-Reece-Rodi (LRR) models, are reviewed herein. RANS and LES models are reviewed, and implications for the simulation of jet and plume mixing are discussed to develop a reference for future researchers performing numerical investigations on jet mixing and dispersion.

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Section: Discharge Through Inclined Dense Jetsmentioning

confidence: 90%

Section: Discharge Through Inclined Dense Jetsmentioning

confidence: 99%

Section: Discharge Through Inclined Dense Jetsmentioning

confidence: 99%

Section: Discharge Through Inclined Dense Jetsmentioning

confidence: 99%

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CFD Modeling of Effluent Discharges: A Review of Past Numerical Studies

Mohammadian

Gildeh

Nistor

2020

Water

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“…As indicated by Figure 2a, the entire domain can be subdivided into 12 segments by the planes of symmetry. To save computational costs, the present simulations only considered the first segment S1, utilized the symmetric boundary condition [8,33] for the planes of symmetry, and employed the "reflect" and "mirror" functions available in ParaView and Tecplot to mirror the results. Preparatory tests indicated that the differences between the present results and those obtained by simulations with the entire domain covered were negligible.…”

Section: Mesh Configurations and Model Setupmentioning

confidence: 99%

Three-Dimensional Numerical Simulations of Buoyant Jets Discharged from a Rosette-Type Multiport Diffuser

Yan

Mohammadian

Chen

2019

JMSE

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In some outfall systems, wastewaters are discharged into ambient water bodies using rosette-type diffusers in the form of multiple buoyant jets, and it is essential to simulate their mixing characteristics for practical applications and optimal design purposes. The mixing processes of a rosette jet group are more complicated than single jets and multiple horizontal or vertical jets, and thus the existing methods cannot be effectively used to simulate their mixing and dilution properties. With the recent advancements in numerical modeling approaches, numerical simulation of wastewater jets as three-dimensional phenomena can be feasible. The present study deals with a fully three-dimensional numerical simulation for buoyant jets discharged from a rosette-type multiport diffuser, with the standard and re-normalization group (RNG) k-ε turbulence models. The simulated results are compared with experimental data, and the results show a good agreement with the experimental data, demonstrating that the numerical model is an efficient and effective tool for simulating rosette jet groups. It was also concluded that the RNG k-ε model leads to better results than the standard k-ε model with a comparable computational cost. The validated model was further utilized to investigate the influences of port inclinations on the mixing behaviors.

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Use of DPSIR Framework to Analyze Water Resources in Qatar and Overview of Reverse Osmosis as an Environment Friendly Technology

Ashfaq

Qiblawey

Zouari

et al. 2018

Env Prog and Sustain Energy

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Qatar and other countries of Gulf Cooperation Council are among the most water scarce countries in the world and are being characterized as “high‐water risk” countries by Water Resource Institute. Therefore, it is important to implement sustainable water resource management that encompass economic, societal, and environmental aspects. In this review article, the Driver‐Pressure‐State‐Impact‐Response framework was used to analyze the water resource system in Qatar in terms of drivers, pressures, change in state, impacts, and responses. It was noted that both economic and population growth together with unsustainable water consumption are major driving forces that are pressurizing the Qatar's water resources (desalinated seawater and renewable groundwater). Currently, desalination plants using Multi‐Stage Flash (MSF) techniques are predominantly being used to meet the rising water demands. However, widespread use of MSF techniques poses several environmental and economic impacts. Therefore, in addition to other management and corrective measures, reverse osmosis (RO) technique has also been suggested to be utilized in desalination industry as a “response” to mitigate those impacts. Since, the performance of RO is mainly affected by biofouling and mineral scaling, the paper also highlights the recent materials (polymers and nano‐materials) used to tackle these problems. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13081, 2019

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Numerical modeling of $$30^{\circ }$$ 30 ∘ and $$45{^\circ }$$ 45 ∘ inclined dense turbulent jets in stationary ambient

Cited by 61 publications

References 35 publications

CFD Modeling of Effluent Discharges: A Review of Past Numerical Studies

CFD Modeling of Effluent Discharges: A Review of Past Numerical Studies

Three-Dimensional Numerical Simulations of Buoyant Jets Discharged from a Rosette-Type Multiport Diffuser

Use of DPSIR Framework to Analyze Water Resources in Qatar and Overview of Reverse Osmosis as an Environment Friendly Technology

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