Numerical Simulation for Convergent Air Curtain Under Undisturbed Area Condition

Shi, Fuqian; Zhu, Zhenying; Jiang, Dahua; Wang, Yuan

doi:10.1007/978-3-642-39578-9_30

Cited by 2 publications

(1 citation statement)

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“…New infiltration/exfiltration correlations of the modeled air curtain were developed as the functions of the pressure difference, flow coefficient, and flow modifier. Shi et al 13 carried out a numerical simulation of convergent air curtain using CFD. For the air curtain at a different angle of incidence, initial wind speed was studied under static conditions using simulation model.…”

Section: Introductionmentioning

confidence: 99%

Computational fluid dynamics simulation of breathing zone of the human for air quality with a personalized air curtain

Alshitawi

Suyambazhahan

Alaboodi

2019

Advances in Mechanical Engineering

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In this article, the air quality is maintained in the breathing zone of a human using personalized air curtain. The breathing zone is modeled and simulated with ANSYS-Fluent 18.1 software and predicted the thermo-fluids flow characteristics in the breathing zone. The clean air is supplied from the air curtain device to distribute in the breathing zone of a human. There are 11 nozzles created in the front portion of the air curtain device to supply clean air in front of the face of the human. The air curtain provides a sealed cover between the pollutant and face, which protects the inward flow of pollutants. The flow becomes turbulent even at low Reynolds numbers 136-686 due to the mixing of air jets from multinozzles in the air curtain device and entrainment of ambient air into the breathing zone. The thermal balance (comfort) between breathing zone and atmosphere was maintained using isothermal air jets. The standard k-e model is used for predicting the turbulent characteristics of air flow. The results obtained from the simulation was analyzed for optimum airflow velocity to occupy the breathing zone with clean air completely. The best flow pattern is achieved for the optimum nozzle exit velocity of 3 m/s, height y = 70 mm from the bottom of breathing zone for nozzle width of 2 mm. These conditions ensured the air quality and the comfort velocity (0.5 to 0.8 m/s) and pressure about 1 bar in the breathing zone.

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Section: Introductionmentioning

confidence: 99%