English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We investigate mucosalivary dispersal and deposition on horizontal surfacescorresponding to human exhalations with physical experiments under still-airconditions. Synthetic fluorescence tagged sprays with size and speeddistributions comparable to human sneezes are observed with high-speed imaging.We show that while some larger droplets follow parabolic trajectories, smallerdroplets stay aloft for several seconds and settle slowly with speedsconsistent with a buoyant cloud dynamics model. The net deposition distributionis observed to become correspondingly broader as the source height $H$ isincreased, ranging from sitting at a table to standing upright. We find thatthe deposited mucosaliva decays exponentially in front of the source, afterpeaking at distance $x = 0.71$\,m when $H = 0.5$\,m, and $x = 0.56$\,m when$H=1.5$\,m, with standard deviations $\approx 0.5$\,m. Greater than 99\% of themucosaliva is deposited within $x = 2$\,m, with faster landing times {\emfurther} from the source. We then demonstrate that a standard nose and mouthmask reduces the mucosaliva dispersed by a factor of at least a hundredcompared to the peaks recorded when unmasked.

Aerial mucosalivary droplet dispersal distributions with implications for disease mitigation