Likelihood of survival of coronavirus in a respiratory droplet deposited on a solid surface

We predict and analyze the drying time of respiratory droplets from a COVID-19 infected subject, which is a crucial time to infect another subject. Drying of the droplet is predicted by using a diffusion-limited evaporation model for a sessile droplet placed on a partially wetted surface with a pinned contact line. The variation in droplet volume, contact angle, ambient temperature, and humidity are considered. We analyze the chances of the survival of the virus present in the droplet based on the lifetime of the droplets under several conditions and find that the chances of the survival of the virus are strongly affected by each of these parameters. The magnitude of shear stress inside the droplet computed using the model is not large enough to obliterate the virus. We also explore the relationship between the drying time of a droplet and the growth rate of the spread of COVID-19 in five different cities and find that they are weakly correlated.

[1]  T. Singhal.  A Review of Coronavirus Disease-2019 (COVID-19) , 2020, The Indian Journal of Pediatrics.

[2]  A. Sen,et al.  Evaporation-induced transport of a pure aqueous droplet by an aqueous mixture droplet , 2020 .

[3]  J. Cooper-White,et al.  Dynamics of water spreading on a glass surface. , 2004, Journal of colloid and interface science.

[4]  R. Bhardwaj,et al.  A combined computational and experimental investigation on evaporation of a sessile water droplet on a heated hydrophilic substrate , 2018, International Journal of Heat and Mass Transfer.

[5]  K. Sefiane,et al.  On the lifetimes of evaporating droplets with related initial and receding contact angles , 2015 .

[6]  Weidong Wang,et al.  No association of COVID-19 transmission with temperature or UV radiation in Chinese cities , 2020, European Respiratory Journal.

[7]  W G Weng,et al.  Characterizations of particle size distribution of the droplets exhaled by sneeze , 2013, Journal of The Royal Society Interface.

[8]  R. Bhardwaj,et al.  Coalescence dynamics of a droplet on a sessile droplet , 2019 .

[9]  Y. Hsieh,et al.  Water Wetting and Retention of Cotton Assemblies as Affected by Alkaline and Bleaching Treatments , 1996 .

[10]  Hua Hu,et al.  Analysis of the microfluid flow in an evaporating sessile droplet. , 2005, Langmuir : the ACS journal of surfaces and colloids.

[11]  Daniel Attinger,et al.  Pattern formation during the evaporation of a colloidal nanoliter drop: a numerical and experimental study , 2009, 1010.2560.

[12]  Y. Li,et al.  How far droplets can move in indoor environments--revisiting the Wells evaporation-falling curve. , 2007, Indoor air.

[13]  Evaporative deposition patterns: spatial dimensions of the deposit. , 2004, Physical review. E, Statistical, nonlinear, and soft matter physics.

[14]  L. Bourouiba.  Turbulent Gas Clouds and Respiratory Pathogen Emissions: Potential Implications for Reducing Transmission of COVID-19. , 2020, JAMA.

[15]  Ronald G. Larson,et al.  Evaporation of a Sessile Droplet on a Substrate , 2002 .

[16]  A. Saha,et al.  Modeling ambient temperature and relative humidity sensitivity of respiratory droplets and their role in determining growth rate of Covid-19 outbreaks , 2020 .

[17]  Daniel Attinger,et al.  Self-assembly of colloidal particles from evaporating droplets: role of DLVO interactions and proposition of a phase diagram. , 2010, Langmuir : the ACS journal of surfaces and colloids.

[18]  R. Young,et al.  Wetting of wood , 1997, Wood Science and Technology.

[19]  Michael Goldblatt,et al.  Aerobiology and Its Role in the Transmission of Infectious Diseases , 2013, Journal of pathogens.

[20]  Y. Li,et al.  Evaporation and dispersion of respiratory droplets from coughing , 2017, Indoor air.

[21]  D. Tyrrell,et al.  Loss of Infectivity on Drying Various Viruses , 1962, Nature.

[22]  Ng Niels Deen,et al.  Effect of viscosity on droplet-droplet collisional interaction , 2017 .

[23]  N. Stilianakis,et al.  Inactivation of influenza A viruses in the environment and modes of transmission: A critical review , 2008, Journal of Infection.

[24]  C. Avedisian,et al.  On the collision of a droplet with a solid surface , 1991, Proceedings of the Royal Society of London. Series A: Mathematical and Physical Sciences.

[25]  Ronald G. Larson,et al.  Transport and deposition patterns in drying sessile droplets , 2014 .

[26]  Seok-Ho Hwang,et al.  Preparation and adhesion performance of transparent acrylic pressure sensitive adhesives for touch screen panel , 2014 .

[27]  Weifeng Lv,et al.  High Temperature and High Humidity Reduce the Transmission of COVID-19 , 2020, SSRN Electronic Journal.

[28]  Julian W. Tang,et al.  The effect of environmental parameters on the survival of airborne infectious agents , 2009, Journal of The Royal Society Interface.