With the COVID-19 pandemic sweeping worldwide, much attention has been paid to infectious viruses. Because of different sizes pathogen-carrying droplets exhaled by individuals infected with COVID-19, influence gravity and inertia on varies, which leads modes transmission virus. Ventilation changes air distribution in a room, affects virus transmission. An appropriate ventilation method that red...

The main objective of this study is to investigate the airflow characteristics in single-sided ventilation. A CFD method large eddy simulation (LES) using particle track technique was conducted study, and results are validated by experiment results. mostly used ventilation efficiency indicators natural Air Flow Rate (AFR) Purging (PFR). AFR volumetric exchange rate through openings PFR effectiv...

Obliquity influences the latitudinal position of Intertropical Convergence Zone (ITCZ). However, specific forcing mechanism remains unclear due to scarcity long-term and high-resolution precipitation records from Indo-Pacific region. Here, we present a new, extended, (∼2 kyr) record covering past ∼410 kyr marine sedimentary sequence collected at southern margin ITCZ's displacement within By int...

BACKGROUND Pleural effusion adversely affects the pressuregenerating capacity of the diaphragm. It uncouples the lung and chest wall, which may result in diaphragmatic dysfunction. Information on the effects of effusion drainage on diaphragmatic function is limited, but several studies report relief of dyspnoea after drainage, which was attributed to improved diaphragmatic mechanics, even if th...

In spite of numerous clinical studies, there is no consensus on the benefit Heliox mixtures can bring to asthmatic patients in terms of work of breathing and ventilation distribution. In this article we use a 3D finite element mathematical model of the lung to study the impact of asthma on effort and ventilation distribution along with the effect of Heliox compared to air. Lung surface displace...

This paper uses airflow modeling and particle-tracking methodologies to compare the risk of contaminant deposition on an operating room (OR) surgical site and back table for different ventilation systems. The ventilation system designs considered incorporated commonly used diffuser types, in particular, conventional, laminar, nonaspirating, and displacement diffuser types. Further, a range of d...

The present paper is a review on methods and technologies for air cleaning from micro organisms and viruses, which are applicable with the present HVAC practices. The advantages and the drawbacks of air dilution, filtration (HEPA, ULPA), ultraviolet germicidal irradiation (UVGI), photocatalytic oxidation (PCO), plasmacluster ions and other technologies for air disinfection and purification is c...

COVID-19 is a respiratory infectious disease that spreads readily between people, and an urgent issue of passengers’ exposure risk assessment in commercial aircraft has been raised because cabin as confined space may carry transmit the worldwide. In this study, droplets transmission process under different ventilation systems twin-aisle wide-body was studied using CFD simulations infection pass...