Effect of Ocean Spray on Vertical Momentum Transport Under High-Wind Conditions |
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| Authors: | Yevgenii Rastigejev Sergey A Suslov Yuh-Lang Lin |
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| Institution: | 1.Department of Mathematics,North Carolina A&T State University,Greensboro,USA;2.Department of Energy and Environmental Systems,North Carolina A&T State University,Greensboro,USA;3.Mathematics H38, FEIS,Swinburne University of Technology,Hawthorn,Australia;4.Department of Physics,North Carolina A&T State University,Greensboro,USA |
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| Abstract: | Two mathematical models are proposed detailing the influence of ocean spray on vertical momentum transport under high-wind
conditions associated with a hurricane or severe storm. The first model is based on a turbulent kinetic energy (TKE) equation
and accounts for the so-called lubrication effect due to the reduction of turbulence intensity. The second model is based
on Monin–Obukhov similarity (MOS) and uses available experimental data. It is demonstrated that the flow acceleration is negligible
for wind speeds below a certain critical value due to the fact that the spray volume concentration is low for such speeds.
For wind speeds higher than the critical value, the spray concentration rapidly increases, which results in significant flow
acceleration. Both models produce qualitatively similar results for all turbulent flow parameters considered. It was found
that the MOS-based model tends to predict a noticeably stronger lubrication effect than the TKE-based model, especially for
lower wind speeds. The results of model calculations are in very good agreement with available experimental data for the spray
production values near the upper bound. It is also shown that neither the value of the turbulent Schmidt number in the TKE-based
model nor the choice of a stability profile function affects the spray-laden flow dynamics significantly. |
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