Comparison between Lagrangian and Eulerian approaches for prediction of particle deposition in turbulent flows

Xu, Zhiming; Han, Zhiyu; Qu, Hongwei

doi:10.1016/j.powtec.2019.09.084

Cited by 42 publications

(7 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Forces acting on each individual particle are considered and the particle momentum and positions are calculated for every step of the solution. Both approaches have some advantages depending on the application [19,20]. With the Lagrangian approach, detailed information for each individual particle injected into the solution domain: particle positions and trajectories, particle momentum, and particle fates (trapped on the surfaces, escaped the solution domain, or stagnated), are available.…”

Section: Particulate Flow and Particle Chargingmentioning

confidence: 99%

A Numerical Analysis on the Submicron- And Micron-Sized Particle Sedimentation in a Wire-to-Plate Electrostatic Precipitator

EKİN

2024

Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi

View full text Add to dashboard Cite

Electrostatic precipitators (ESPs) are frequently utilized in collecting fine organic and inorganic materials from continuous liquid with few moving parts and high efficiency using electrically charging the particles. In this study, cross-sectional 2D geometry of a wire-to-plate electrostatic precipitator the parametric data of which originally published elsewhere was numerically modeled and validated to investigate submicron-micron particle charging in terms of diffusion and field charging mechanisms and precipitation behavior of particles with detailed electric field properties. Electric field, gas flow, and particle trajectory equations are coupled and solved in a multiphysics solver. Particle tracking is realized with the Lagrangian approach. Results indicate variations in electric field strength and space charge density between corona electrodes, with space charge present in the entire precipitation channel. Between two different charging mechanisms, diffusion charging prevails for charge accumulated on submicron particles, whereas field charging becomes dominant for particles larger than 1μm diameter. However, for the ESP configuration considered in this study, particles reach a charge saturation in less than 0.7 seconds, regardless of their size. Although calculated precipitation efficiencies for micron-sized particles can reach to 100%, efficiencies for submicron particle range drop with increasing particle size, as diffusion charging rapidly loses its effectiveness, in 50-250nm range.

show abstract

Section: Particulate Flow and Particle Chargingmentioning

confidence: 99%

A Numerical Analysis on the Submicron- And Micron-Sized Particle Sedimentation in a Wire-to-Plate Electrostatic Precipitator

EKİN

2024

Kahramanmaraş Sütçü İmam Üniversitesi Mühendislik Bilimleri Dergisi

View full text Add to dashboard Cite

show abstract

“…In this approach, there are no collisions between particles because they are simulated as points. In [19], the researchers show that the results obtained using the Lagrangian approach are worse compared to the Eulerian approach, and the simulation time is longer for the latter. This method can be applied in flows with a volume concentration of up to 10%.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Possibilities of Energy Recovery from Gravity Flows in Pipelines in a Copper Ore Enrichment Plant

Płusa,

Kocewiak,

Duda

2024

Energies

View full text Add to dashboard Cite

Considering the need to reduce climate change and energy costs, the possibilities of energy recovery have been sought for many years, even if this should involve significant complexity of the technological process. Attempts to recover energy from a flowing medium containing a large amount of a solid phase are rather rare. This is mainly due to unfavorable erosion and sludge phenomena. The aim of this work is to analyze the possibility of recovering energy from gravity flows in the pipelines of a copper ore enrichment plant. The analysis will be carried out for a system operating in a plant in Poland. An energy recovery device will be designed taking into account the flow of a two-phase medium. For this purpose, flow calculations will be performed. The calculation results obtained for the two-phase flow will be verified based on the experimental results presented in the literature. The simulations will make it possible to determine the power of the designed device.

show abstract

“…In recent years, numerical simulations based on computational fluid dynamics (CFD) methods have gradually become a powerful tool for studying particle settlement and particle-wall interactions. [23][24][25] Arsalanloo and Abbasalizadeh 26 used the Reynolds Stress Model (RSM) and the Lagrangian method to study the deposition and infiltration of particles in a 90°bend with a small diameter of 8.51 mm in the presence of swirling flow. The results show that both decreasing the swirl pitch and increasing the blade height increase the swirl intensity at higher Stokes numbers, while higher swirl intensity could reduce the particle deposition rate.…”

Section: Introductionmentioning

confidence: 99%

The effects of imposed swirling flow on the transport and deposition of particulate pollutants in the 90° industrial duct bends: An Eulerian-Lagrangian approach

Han,

Diao,

Zhuang

et al. 2023

Indoor and Built Environment

View full text Add to dashboard Cite

Duct bend is one of the important parts of ventilation and dust removal systems, and particles deposited in curved ducts can reduce system efficiency or cause erosion on the bend wall. To investigate whether particle deposition is affected by imposed swirl on fluid flow, this article combines the RSM turbulence model and the Discrete Phase Model (DPM) to predict the deposition efficiency of particles in the bend under high Reynolds number conditions. The results show that the imposed swirl flow modifies the secondary flow initially dominated by the pressure gradient caused by the curvature effect. With the gradual increase of the swirl number ( S n), the deposition efficiency of the particles gradually decreased. However, when the swirl number is low ( S n ≤ 0.17), particles with smaller Stokes numbers are more susceptible to the intensity of turbulence. The higher the turbulence intensity near the wall, the easier it is for low inertia particles ( St ≤ 0.456) to deposit. The higher swirl intensity dominates the centrifugal force, reduces the turbulent intensity in the central region of the duct, improves the stability of the airflow and makes it easier for particles with larger inertia ( St ≥ 0.811) to pass through the bend.

show abstract

Comparison between Lagrangian and Eulerian approaches for prediction of particle deposition in turbulent flows

Cited by 42 publications

References 29 publications

A Numerical Analysis on the Submicron- And Micron-Sized Particle Sedimentation in a Wire-to-Plate Electrostatic Precipitator

A Numerical Analysis on the Submicron- And Micron-Sized Particle Sedimentation in a Wire-to-Plate Electrostatic Precipitator

Analysis of the Possibilities of Energy Recovery from Gravity Flows in Pipelines in a Copper Ore Enrichment Plant

The effects of imposed swirling flow on the transport and deposition of particulate pollutants in the 90° industrial duct bends: An Eulerian-Lagrangian approach

Contact Info

Product

Resources

About