scholarly journals Numerical Study of Variable Lung Ventilation Strategies

2015 ◽  
pp. 299-306
Author(s):  
Reena Yadav ◽  
Mayur Ghatge ◽  
Kirankumar Hiremath ◽  
Ganesh Bagler
Keyword(s):  
Numerical Study ◽  
Lung Ventilation ◽  
Ventilation Strategies

scholarly journals A numerical study of ventilation strategies for infection risk mitigation in general inpatient wards

2020 ◽  
Vol 13 (4) ◽  
pp. 887-896 ◽  
Author(s):  
Manoj Kumar Satheesan ◽  
Kwok Wai Mui ◽  
Ling Tim Wong
Keyword(s):  
Risk Mitigation ◽  
Numerical Study ◽  
Infection Risk ◽  
Ventilation Strategies

Numerical study of the effects of ventilated cavities outlet location on thermal comfort and air quality

2019 ◽  
Vol 29 (11) ◽  
pp. 4462-4483
Author(s):  
Zohir Younsi ◽  
Lounes Koufi ◽  
Hassane Naji
Keyword(s):  
Air Quality ◽  
Thermal Comfort ◽  
Numerical Study ◽  
Vertical Wall ◽  
Heat Removal ◽  
Fluid Temperature ◽  
Position Effects ◽  
Content Type ◽  
Mixed Regime ◽  
Ventilation Strategies

Purpose A comprehensive investigation on the outlet air position effects on the thermal comfort and air quality has been achieved. In addition, airflow and temperature distributions in ventilated cavities filled with an air-CO2 mixture with mixed convection are predicted. The airflow enters from the cavity through an opening in the lower side of the left vertical wall and exits through the opening in one wall of the cavity. This paper aims to investigate the outlet location effect, four different placement configurations of output ports are considered. Three of them are placed on the upper side and the fourth on top of the opposite side of the inlet opening. A uniform heat and CO2 contaminant source are applied on the left vertical wall, while the remaining walls are impermeable and adiabatic to heat and solute. The cooling efficiency inside the enclosure and the average fluid temperature are computed for different Reynolds and Rayleigh numbers to find the most suitable fluid outlet position that ensures indoor comfortable conditions while effectively removing heat and the contaminant. This is demonstrated by three relevant indices, namely, the effectiveness for heat removal, the contaminant removal and the index of indoor air quality. Design/methodology/approach The simulations were performed via the finite-volume scSTREAM CFD solver V11. Three different values of CO2 amount are considered, namely, 103, 2 × 103 and 3 × 103 ppm, the Reynolds number being in the range 100 ≤ Re ≤ 800. Findings Based on the findings obtained, it is the configuration whose air outlet is placed near the heat source and the contaminant, which provides a better air distribution and a ventilation efficiency compared to the others ventilation strategies. Originality/value The studies on heat and mass transfers by natural and forced convection in ventilated cavities remain a fruitful research topic. Thereby, such a study deals with different ventilation strategies through cavities containing an air-CO2 mixture subjected to a mixed regime. In particular, the air inlet velocity and contaminant sources’ effects on thermal comfort and air quality have been investigated.

scholarly journals (A207) Resuscitation of Casualties Following Exposure to Toxic Chemicals: What is New?

2011 ◽  
Vol 26 (S1) ◽  
pp. s57-s57 ◽  
Author(s):  
D.J. Baker
Keyword(s):  
Animal Studies ◽  
Emergency Services ◽  
Life Support ◽  
Advanced Life Support ◽  
Lung Ventilation ◽  
Protective Equipment ◽  
Early Application ◽  
Life Threatening ◽  
Ventilation Strategies ◽  
The Ideal

Injury following exposure to toxic chemical agents has potential life–threatening effects, particularly on the respiratory system. Antidotes alone often are not sufficient to reverse this situation, and the need to provide early and effective advanced life support for chemical casualties increasingly has been accepted by emergency services around the world. Although the principles of life support are the same for toxic as for conventional casualties, the requirement for responders to wear personal protective equipment makes airway and ventilation management more difficult. Special training and familiarity with devices and equipment used are essential to ensure effectiveness. Recent studies have indicated both the limitations and the possibilities for resuscitation of casualties in a contaminated environment before decontamination. Ventilation of patients with respiratory failure or arrest requires the use of devices which are able to operate and be used by responders wearing protective equipment. The laryngeal mask airway has been shown to be an easier and viable alternative to intubation in this situation. Portable automatic ventilators have been developed which can be used to provide controlled ventilation in a contaminated zone. The ideal mode of ventilation for potentially damaged lungs, following exposure to agents such as chlorine and phosgene has yet to be established. There may be a case for early application of the protective lung ventilation strategies that are now common in intensive care units. This presentation will review recent human and animal studies related to resuscitation in a contaminated zone and provide illustrations of the practical approaches currently used by emergency medical services.

scholarly journals Lung ventilation strategies and regional lung inflammation

Critical Care ◽  
2013 ◽  
Vol 17 (5) ◽  
pp. 184
Author(s):  
Liming Luan ◽  
Antonio Hernandez ◽  
Edward R Sherwood
Keyword(s):  
Lung Inflammation ◽  
Lung Ventilation ◽  
Regional Lung ◽  
Ventilation Strategies

Decision-making analysis of ventilation strategies under complex situations: A numerical study

2021 ◽  
pp. 108217
Author(s):  
Weijia Zhang ◽  
Weirong Zhang ◽  
Kunio Mizutani ◽  
Haotian Zhang
Keyword(s):  
Decision Making ◽  
Numerical Study ◽  
Ventilation Strategies
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