Simulation of Inertial Droplet Dispersion and the Spray Mediated Fluxes in the Atmospheric Boundary Layer Above Waved Water Surface: A Lagrangian Stochastic Model Versus Direct Numerical Simulation

Lagrangian stochastic models (LSM) are widely used to model the dispersion of sea spray droplets injected from the water surface into the marine atmospheric boundary layer (MABL) and for evaluation of the spray impact on the exchange fluxes between the atmosphere and the ocean. While moving through...

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Bibliographic Details
Published in:Boundary-layer meteorology 2023-07, Vol.188 (1), p.135-158
Main Authors: Troitskaya, Yuliya, Druzhinin, Oleg, Gladskikh, Daria, Ermakova, Olga, Soustova, Irina
Format: Article
Language:English
Subjects:
Air flow
Air temperature
Air-water interface
Analysis
Anisotropy
Atmospheric boundary layer
Atmospheric models
Atmospheric Protection/Air Quality Control/Air Pollution
Atmospheric Sciences
Boundary layers
Coefficients
Constants
Diffusion rate
Direct numerical simulation
Dispersion
Droplets
Earth and Environmental Science
Earth Sciences
Fluxes
Latent heat
Marine atmospheric boundary layer
Mathematical models
Meteorology
Modelling
Numerical analysis
Numerical simulations
Planetary boundary layer
Research Article
Sea spray
Sensible and latent heat
Simulation
Simulation methods
Spray
Stochastic models
Stochasticity
Turbulence
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Summary:Lagrangian stochastic models (LSM) are widely used to model the dispersion of sea spray droplets injected from the water surface into the marine atmospheric boundary layer (MABL) and for evaluation of the spray impact on the exchange fluxes between the atmosphere and the ocean. While moving through the MABL the droplets pass through the region of high gradients of air velocity, temperature and humidity occurring in the vicinity of the air–water interface. In this case, the applicability of LSMs constructed under the assumption of weakly inhomogeneous flows is questionable. In this work, we develop a Lagrangian stochastic model taking into account the strongly inhomogeneous structure of the airflow in MABL and, in particular, the anisotropy of turbulence dissipation rate. The model constants and the diffusion matrix coefficients are calibrated by comparison of the LSM prediction for the profiles of droplet concentration and the exchange fluxes of sensible and latent heat against the results of direct numerical simulation of turbulent, droplet-laden airflow over a waved water surface.
ISSN:0006-8314
1573-1472
DOI:10.1007/s10546-023-00806-0