• Corpus ID: 232427934

Superdiffusion of Aerosols Emitted After Sneezing -- Nonequilibrium Statistical Mechanics Approach

  title={Superdiffusion of Aerosols Emitted After Sneezing -- Nonequilibrium Statistical Mechanics Approach},
  author={Satoshi Sugimoto and Ken Umeno},
We study a stochastic behavior of aerosols by the non-equilibrium statistical mechanics approach using the analytical approach of the Langevin equation. We firstly show that superdiffusion can possibly occur right after the emission, which may be attributed to the physical mechanism of the outbreak of the COVID-19 pandemic. We also provide clear evidence of the least required distance to prevent infections occurred by aerosols. In particular, the required distance to prevent aerosol infections… 

Figures and Tables from this paper



Origin of hyperdiffusion in generalized Brownian motion.

We study a minimal non-Markovian model of superdiffusion which originates from long-range velocity correlations within the generalized Langevin equation approach. The model allows for a

Experimental characterization of speech aerosol dispersion dynamics

The dispersions of aerosols from vocalization by a human subject are quantified using high-speed particle image velocimetry and results indicate aerosol productions and penetrations are not correlated.

Modeling of Viral Aerosol Transmission and Detection

A complete system model and an end-to-end mathematical model for the transmission channel under certain constraints and boundary conditions are presented and the system response for both continuous sources such as breathing and jet or impulsive sourcessuch as coughing and sneezing is derived.

Dispersion of speech aerosols in the context of physical distancing recommendations

High-speed particle image velocimetry (PIV) was used to quantify the dispersion of aerosol-laden gas clouds generated during phonetic vocalization by a human subject at different sound intensity

Airborne dispersion of droplets during coughing: a physical model of viral transmission

It is found social distancing effective at reducing transmission potential across all droplet sizes, however, the presence of a human body 1 m away modifies the aerodynamics so that downstream droplet dispersion is enhanced, which has implications on safe distancing in queues.

How far droplets can move in indoor environments--revisiting the Wells evaporation-falling curve.

The results indicate that a droplet's size predominately dictates its evaporation and movement after being expelled, and there is a need to examine the air distribution systems in hospital wards for controlling both airborne and droplet-borne transmitted diseases.

On the Resistance Experienced by Spheres in their Motion through Gases

Kinetic theory of the resistance to a sphere moving through a gas.— (1) Droplets small in comparison with the mean free path. The high degree of accuracy achieved in the experimental determination of

Detailed simulation of viral propagation in the built environment

The ordinary and partial differential equations describing the physics of these processes with high fidelity are presented, as well as appropriate numerical schemes to solve them.

Violent expiratory events: on coughing and sneezing

Abstract Violent respiratory events such as coughs and sneezes play a key role in transferring respiratory diseases between infectious and susceptible individuals. We present the results of a

Stochastic Processes in Physics and Chemistry

N G van Kampen 1981 Amsterdam: North-Holland xiv + 419 pp price Dfl 180 This is a book which, at a lower price, could be expected to become an essential part of the library of every physical