Comparison of the Eulerian and Lagrangian methods for predicting particle transport in enclosed spaces

Zhang, Z.; Chen, Qingyan

doi:10.1016/j.atmosenv.2006.05.086

Cited by 387 publications

(199 citation statements)

References 18 publications

Supporting

Mentioning

197

Contrasting

Unclassified

Order By: Relevance

“…This indicates that small particles behave like a passive tracer gas. This also implies that both the Eulerian and Lagrangian methods should have similar accuracy in predicting transport and dispersion of small particles as shown in Figures 6-8 as already being found by others [15][16][17]. However, the particle concentration was much higher than that of the tracer gas at the locations near the ceiling region in position 3.…”

Section: Discussionmentioning

confidence: 67%

See 1 more Smart Citation

Experimental and numerical investigation of airflow and contaminant transport in an airliner cabin mockup

Zhang

Chen

Mazumdar

et al. 2009

Building and Environment

278

159

View full text Add to dashboard Cite

The study of airflow and contaminant transport in airliner cabins is very important for creating a comfortable and healthy environment. This paper shows the results of such a study by conducting experimental measurements and numerical simulations of airflow and contaminant transport in a section of half occupied, twin-aisle cabin mockup. The air velocity and air temperature were measured by ultrasonic and omni-directional anemometers. A gaseous contaminant was simulated by a tracer gas, sulfur hexafluoride or SF 6 , and measured by a photoacoustic multi-gas analyzer. A particulate contaminant was simulated by 0.7 μm Di-Ethyl-HexylSebacat (DEHS) particles and measured by an optical particle sizer. The numerical simulations used the Reynolds averaged Navier-Stokes equations based on the RNG k-ε model to solve the air velocity, air temperature, and gas contaminant concentration; and employed a Lagrangian method to model the particle transport. The numerical results quantitatively agreed with the experimental data while some remarkable differences exist in airflow distributions. Both the experimental measurements and computer simulations were not free from errors. A complete and accurate validation for a complicated cabin environment is challenging and difficult.

show abstract

Section: Discussionmentioning

confidence: 67%

“…This study also shows that a cabin environment is similar to a building environment as they both are ventilated and enclosed spaces. Therefore, the integrated CFD tool presented in the paper for airflow and contaminant transportation modeling can be also applied to building environment upon appropriate validations [13][14][15].…”

Section: Discussionmentioning

confidence: 99%

Experimental and numerical investigation of airflow and contaminant transport in an airliner cabin mockup

Zhang

Chen

Mazumdar

et al. 2009

Building and Environment

278

159

View full text Add to dashboard Cite

show abstract

“…Flow was simulated using a Reynolds' Average Navier-Stokes (RANS) approach, the most widely used method for indoor airflow [28][29][30][31][32][33]. A velocity profile was defined at the supply air diffuser, based on anemometry measurements (Fig.…”

Section: Cfd Methodologymentioning

confidence: 99%

Bioaerosol deposition in single and two-bed hospital rooms: A numerical and experimental study

King

Noakes

Sleigh

et al. 2013

Building and Environment

View full text Add to dashboard Cite

Abstract:Aerial dispersion of pathogenic microorganisms and subsequent contamination of surfaces is well recognised as a potential transmission route for hospital acquired infection. Simulation approaches such as computational fluid dynamics (CFD) are increasingly used to model Results for all layouts demonstrate that small particle bioaerosols are deposited throughout a room with no clear correlation between relative surface concentration and distance from the source. However, a physical partition separating patients is shown to be effective at reducing cross-contamination of neighbouring patient zones.

show abstract

“…The spraying duration was controlled by a LabVIEW program and was pre-set to 0.1 seconds. Prior studies have adopted periods of similar duration (Zhang and Chen 2007).…”

Section: Experimental Set-up and Measurementmentioning

confidence: 99%

Experimental Investigation of Exhaled Aerosol Transport Under Two Ventilation Systems

Lai

Wong

2010

Aerosol Science and Technology

View full text Add to dashboard Cite

Although the importance and implications of studying expiratory droplet concentration distribution in indoor environments are obvious, experimental measurements are very scarce and incomplete. In the work described herein, spatial and temporal aerosol concentrations generated by a modeled expiratory process were studied experimentally. Two heated manikins were placed inside a chamber with either a displacement ventilation system or a ceiling supply and ceiling return ventilation system. One of the manikins emitted 0.05 micrometer monodisperse polystyrene microspheres mimicking the generation of expiratory droplets. Flow characteristics were measured by a hot-film anemometry system before and after the momentary emission of aerosols at three locations. The temporal concentration profiles at eight locations were also measured. The results show that a high-speed air jet easily penetrates the boundary layer of the manikin regardless of the ventilation system used. Transient ventilation effectiveness was also evaluated and compared for both ventilation systems. The results show that the ventilation effectiveness of displacement ventilation is always higher than that of ceiling-type ventilation. Experimental observation also suggests that the presumption of complete mixing must be applied cautiously.

show abstract

Comparison of the Eulerian and Lagrangian methods for predicting particle transport in enclosed spaces

Cited by 387 publications

References 18 publications

Experimental and numerical investigation of airflow and contaminant transport in an airliner cabin mockup

Experimental and numerical investigation of airflow and contaminant transport in an airliner cabin mockup

Bioaerosol deposition in single and two-bed hospital rooms: A numerical and experimental study

Experimental Investigation of Exhaled Aerosol Transport Under Two Ventilation Systems

Contact Info

Product

Resources

About