Evaporation of ethanol-water sessile droplet of different compositions at an elevated substrate temperature

Spreading of respiratory diseases, such as COVID-19, from contaminated surfaces is dependent on the drying time of the deposited droplets containing the virus. The evaporation rate depends on environmental conditions, such as ambient temperature and relative humidity and physical properties (e.g., droplet volume, contact angle and composition). The respiratory droplets contain salt (NaCl), protein (mucin), and surfactant (dipalmitoylphosphatidylcholine) in addition to water, which are expected to influence the evaporation in a big way. A diffusion-based theoretical model for estimating the drying time is developed which takes into account the dynamic contact angle of saliva droplets laden with salt and insoluble surfactants. The effect of the initial volume, contact angle, salinity, surfactant concentration, ambient temperature and relative humidity on the drying time of droplets is investigated.

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“…Refs. [ 4 , 9 – 11 ]). Gurrala et al [ 9 ] investigated the evaporation of sessile droplets at different temperatures.…”

Section: Introductionmentioning

confidence: 99%

“…[ 4 , 9 – 11 ]). Gurrala et al [ 9 ] investigated the evaporation of sessile droplets at different temperatures. They compared the results obtained from the theoretical model that includes the diffusion, free convection and passive transport of air with their experiments for different compositions and surface temperatures.…”

Section: Introductionmentioning

confidence: 99%

Lifetime of sessile saliva droplets in the context of SARS-CoV-2

Balusamy

Banerjee

Sahu

2021

International Communications in Heat and Mass Transfer

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“…2016), particle deposition (Shmuylovich, Shen & Stone 2002; Sefiane, Tadrist & Douglas 2003), Marangoni currents (Gurrala et al. 2019; Gao et al. 2020) or the importance of surface hydrophobicity and wettability for the evaporation of drops and droplets (He, Liao & Qiu 2017).…”

Section: Introductionmentioning

confidence: 99%

Theoretical and numerical analysis of the evaporation of mono- and multicomponent single fuel droplets

2021

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“…The study of sessile droplet dynamics on solid substrates has received considerable attention in the literature due to its numerous practical applications and scientific challenges (de Gennes 1985;Renardy, Renardy & Li 2001;Bonn et al 2009;Gurrala et al 2019). Controlled external forcing and imposed temperature/chemical gradients have been frequently used in many industrial applications involving coating processes and microfluidic devices to vary the surface wettability of different substrates (Randive et al 2015;Kumar, Bhardwaj & Sahu 2020).…”

Section: Introductionmentioning

confidence: 99%