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Flow and the Virus

While the new coronavirus (SARS-CoV-2) menaces our world with its transmission, and while those infected battle their COVID-19 symptoms, the fluid dynamics community continues its remarkable work productively. Day by day, this community is responding by deepening our understanding of the fluid facets of the ways the new coronavirus spreads, infects, behaves in suspension, or how its fascinating particle design confers its flow properties, or how this design might suggest drug or vaccine development. We devote this special collection to the fascinating fluid dynamics behind the new coronavirus.

Guest Editors: Alan Jeffrey Giacomin, Dimitris Drikakis, Savvas Hatzikiriakos

Particulate, Multiphase, and Granular Flows

On particle dispersion statistics using unsupervised learning and Gaussian mixture models

Nicholas Christakis (Νικόλαος Χρηστάκης); Dimitris Drikakis (Δημήτρης Δρικάκης)

https://doi.org/10.1063/5.0229111

Particulate, Multiphase, and Granular Flows

A numerical investigation on the effects of passenger movement on droplet dispersion in a high-speed train compartment

Fan Wu (伍钒); Zhiqiang Fan (范志强); Hang Dong (董航); Shan Ma (马珊); Renze Xu (徐任泽); Hengkui Li (李恒奎)

https://doi.org/10.1063/5.0220131

Particulate, Multiphase, and Granular Flows

Statistical analysis of infectious disease transmission risk based on exhaled respiratory droplet trajectory distribution

Marco Cavazzuti; Paolo Tartarini

https://doi.org/10.1063/5.0213041

Turbulent Flows

Multi-objective ventilation optimization for indoor air quality, thermal comfort, and energy conservation in the post-pandemic era: A case study for a moving elevator

Dan Mei (梅丹); Xinwen Zhang (张馨文); Chenxia Wang (王晨霞); Li Liu (刘力); Jiaqian Li (李佳倩)

https://doi.org/10.1063/5.0212810

Biofluid Mechanics

Asymmetric aerosol volume transmission: A computational approach toward infection prevention efficiency of face masks

D. A. Matthijs de Winter; Frank M. Verhoeven; Lucie C. Vermeulen; Erwin Duizer; Alvin A. Bartels; Ana Maria de Roda Husman; Jack F. Schijven

https://doi.org/10.1063/5.0204150

Turbulent Flows

Numerical study on the onset of global-scale flow from individual buoyant plumes: Implications for indoor disease transmission

Chao-Ben Zhao (赵超本); Jian-Zhao Wu (吴建钊); Bo-Fu Wang (王伯福); Tienchong Chang (张田忠); Quan Zhou (周全); Kai Leong Chong (庄启亮)

https://doi.org/10.1063/5.0191573

Particulate, Multiphase, and Granular Flows

Cloud and droplet dynamics during a human coughing event under fully mixed and unmixed room conditions

Arthur Hajaali; Thorsten Stoesser; Shaun Fitzgerald

https://doi.org/10.1063/5.0185686

Particulate, Multiphase, and Granular Flows

Performance of low-volume air cleaner and local exhaust in mitigating airborne transmission in hospital outpatient rooms

Jie Zong (宗婕); Chen Lin (林晨); Zhengtao Ai (艾正涛)

https://doi.org/10.1063/5.0185630

Particulate, Multiphase, and Granular Flows

The effects of ventilation conditions on mitigating airborne virus transmission

Konstantinos Ritos (Kωνσταντίνoϛ Pήτoϛ); Dimitris Drikakis (Δημήτρηϛ Δρικάκηϛ); Ioannis William Kokkinakis (Iωάννηϛ Koκκινάκηϛ)

https://doi.org/10.1063/5.0185296

Particulate, Multiphase, and Granular Flows

Unsupervised machine learning of virus dispersion indoors

Nicholas Christakis (Nικóλαoς Xρηστάκης); Dimitris Drikakis (Δημήτρης Δρικάκης); Konstantinos Ritos (Kωνσταντίνoς Pήτoς); Ioannis W. Kokkinakis (Iωάννης Koκκινάκης)

https://doi.org/10.1063/5.0188610

Turbulent Flows