Improving air flow and ventilation in an indoor environment is central to mitigating the airborne transmission of aerosols. Examples include, COVID-19 or similar diseases that transmit by airborne aerosols or respiratory droplets. While there are standard guidelines for enhancing the ventilation of space, the effect of a ceiling fan on the ventilation has not been explored. Such an intervention could be critical, especially in a resource-limited setting. In the present work, we numerically study the effect of a rotating ceiling fan on indoor air ventilation using computational fluid dynamics (CFD) simulations. In particular, we employ RANS turbulence model and compare the computed flow fields for a stationary and rotating fan in an office room with a door and window. While a re-circulation zone spans the whole space for the stationary fan, stronger re-circulation zones and small stagnation zones appear in the flow-field inside the room for the case of a rotating fan. The re-circulation zones help bring in fresh air through the window and remove stale air through the door, thereby improving the ventilation rate by one order of magnitude. We briefly discuss the chances of infection by aerosols via flow-fields corresponding to stationary and rotating fans.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9887580 | PMC |
| http://dx.doi.org/10.1007/s41403-023-00387-x | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Cross-Cultural Adaptation, Feasibility, Reliability, and Validity Tests of the Chinese Version of Ankle Ligament Reconstruction-Return to Sport After Injury Scale.
Orthop J Sports Med
October 2024
Department of Rehabilitation, Senior Department of Orthopedics, the Fourth Medical Center of PLA General Hospital, Beijing, China.
Article Synopsis
- The study focuses on translating and validating the Ankle Ligament Reconstruction-Return to Sport After Injury (ALR-RSI) scale for use in the Chinese population following lateral ankle ligament injuries.
- The results show that the Chinese version, ALR-RSI-CHN, has high reliability and internal consistency, with impressive scores in both test-retest reliability and correlation with other established scales.
- There is a notable difference in ALR-RSI-CHN scores between patients who returned to sports (average score of 53.60) and those who did not (average score of 42.25), indicating its effectiveness in assessing readiness to return to sports post-injury.
Introduction: The COVID-19 pandemic has necessitated the widespread use of personal protective equipment (PPE), particularly in high-risk environments. Full-body PPE is favoured for its comprehensive protection against the virus but poses challenges to the body's thermoregulatory system as it inhibits air exchange. This randomised trial was undertaken to investigate the effects of wearing a commonly used gown-type full-body PPE kit in a simulated environment.
View Article and Find Full Text PDFNumerical performance of CO accumulation and droplet dispersion from a cough inside a hospital lift under different ventilation strategies.
Sci Rep
March 2024
Energy Engineering Department, School of Engineering, University of the Basque Country (UPV/EHU), Plaza Ingeniero Torres Quevedo, Building 1, 48013, Bilbao, Spain.
The impact of mechanical ventilation on airborne diseases is not completely known. The recent pandemic of COVID-19 clearly showed that additional investigations are necessary. The use of computational tools is an advantage that needs to be included in the study of designing safe places.
View Article and Find Full Text PDFThe implementation of an image-guided system at a proton therapy center facility.
J Appl Clin Med Phys
March 2024
Karmanos Cancer Institute at McLaren-Flint, McLaren Proton Therapy Center, Flint, Michigan, USA.
Purpose: Pencil Beam Scanning (PBS) proton therapy has similar requirements on patient alignment to within 1 mm and 1-degree accuracy as photon radiosurgery. This study describes general workflow, acceptance, and commissioning test procedures and their respective results for an independent robotic arm used for Image Guided Radiotherapy (IGRT) for a Proton Therapy System.
Methods: The system is equipped with kV-imaging techniques capable of orthogonal and Cone-Beam Computed Tomography (CBCT) imaging modalities mounted on an independent robotic arm gantry attached to the ceiling.
Traumatic Head Injuries from Ceiling Fans at a Pediatric Level I Trauma Center in the United States.
Pediatr Neurosurg
February 2024
Trauma and Injury Research Center, Dell Children's Medical Center, Austin, Texas, USA.
Background/objective: Several studies describe traumatic head injuries caused by ceiling fans in Australia, the Middle East, and Malaysia. Some injuries required neurosurgical intervention, especially those caused by metallic ceiling fans. This study describes traumatic head injuries caused by ceiling fans at a single pediatric level 1 trauma center in the Southern USA.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!