The influence of air inlet angle in swirl diffusers of UFAD system on distribution and deposition of indoor particles

Taheri, Morteza; Zolfaghari, Seyed Alireza; Afzalian, Mahdi; Hassanzadeh, H.

doi:10.1016/j.buildenv.2021.107613

Cited by 12 publications

(2 citation statements)

References 28 publications

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“…The characteristics of airflows and particle distributions in airliner cabins are usually determined by experimental measurements [ [31] , [32] , [33] , [34] ] and numerical simulations [ [35] , [36] , [37] , [38] ]. The air distribution affects the distribution of particles and spread of pathogenic microbial aerosol particles [ 39 , 40 ]. Gupta et al [ 41 ] used the deterministic and Wells--Riley equations to evaluate the infection risk in a twin-aisle, fully occupied aircraft cabin.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Liu

Cao

et al. 2022

Building and Environment

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Section: Introductionmentioning

confidence: 99%

Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Liu

Cao

et al. 2022

Building and Environment

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“…al [10] also found that the well-designed UFAD systems could provide a good thermal environment. Furthermore, the influence of air inlet angle in swirl diffusers of UFAD system on distribution and deposition of indoor particles was investigated by M. Taheri et al [11], and they found that for the particles with different sizes, the pollutant concentration is different with the increasing of the inlet air angle. Meanwhile, S. Alotaibi et al [12] numerically studied the influence of mixed and displacement air distribution systems on concentrations of micro-particles emitted from floor or generated by breathing, and the results showed that the performance of DV in particle removal is largely dependent on particle generation location.…”

Section: Introductionmentioning

confidence: 99%

Effect of Different Ventilation Systems on Concentrations of Indoor Particle Emitted from Floor of the Office

Yao²,

Luo³

et al. 2022

E3S Web Conf.

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A three-dimensional numerical simulation of airflow, temperature, and pollutant concentration distributions with underfloor air distribution (UFAD) system and displacement ventilation (DV) systems are presented for different operating conditions. Since the particles deposited on the floors can be re-introduced into the air through re- suspension and then constitute a threat to human’s health, an optimal ventilation system is required to reduce the indoor air particle concentrations. In the present study, the effects of different systems on the concentrations of indoor particles are numerically investigated by an Eulerian-Lagrangian method, and the RNG k-ε model is adopted for the simulation. Three different supply air velocities (0.2-0.4 m/s) and different supply air temperatures (20 ℃, 22 ℃ and 24 ℃) are considered in the simulation. Meanwhile, the thermal effect of the human body on the micro-environment and its interaction with the surrounding environment are comprehensively evaluated. The simulation results shows that for the UFAD and DV systems, good performance of particle removal is obtained with the high air supply speed for the DV system, while under larger temperature gradient of the indoor environment, the UFAD system is capable of reducing the concentration of the particles emitted from the floors with lower air supply speed.

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Decoupling transient effects of factors affected by air recirculation devices on contaminant distribution in ventilated spaces

Shao

Hao

Liu

et al. 2021

Building and Environment

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The influence of air inlet angle in swirl diffusers of UFAD system on distribution and deposition of indoor particles

Cited by 12 publications

References 28 publications

Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Evaluation of different air distribution systems in a commercial airliner cabin in terms of comfort and COVID-19 infection risk

Effect of Different Ventilation Systems on Concentrations of Indoor Particle Emitted from Floor of the Office

Decoupling transient effects of factors affected by air recirculation devices on contaminant distribution in ventilated spaces

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