Changeset 11315 for NEMO/branches/2019/dev_r11233_obsasm_docfixes/doc/latex/NEMO/subfiles/chap_ZDF.tex

Timestamp:

2019-07-19T19:12:23+02:00 (5 years ago)

Author:

djlea

Message:

#2297 Merge in the latest trunk

File:

• NEMO/branches/2019/dev_r11233_obsasm_docfixes/doc/latex/NEMO/subfiles/chap_ZDF.tex (modified) (1 diff)

NEMO/branches/2019/dev_r11233_obsasm_docfixes/doc/latex/NEMO/subfiles/chap_ZDF.tex

@@ -1235 +1235 @@
 \label{subsec:ZDF_swm}
 
-TBC ...
+Surface waves produce an enhanced mixing through wave-turbulence interaction.
+In addition to breaking waves induced turbulence (\autoref{subsec:ZDF_tke}),
+the influence of non-breaking waves can be accounted introducing 
+wave-induced viscosity and diffusivity as a function of the wave number spectrum.
+Following \citet{qiao.yuan.ea_OD10}, a formulation of wave-induced mixing coefficient
+is provided  as a function of wave amplitude, Stokes Drift and wave-number:
+
+\begin{equation}
+  \label{eq:Bv}
+  B_{v} = \alpha {A} {U}_{st} {exp(3kz)}
+\end{equation}
+
+Where $B_{v}$ is the wave-induced mixing coefficient, $A$ is the wave amplitude, 
+${U}_{st}$ is the Stokes Drift velocity, $k$ is the wave number and $\alpha$ 
+is a constant which should be determined by observations or 
+numerical experiments and is set to be 1.
+
+The coefficient $B_{v}$ is then directly added to the vertical viscosity 
+and diffusivity coefficients.
+
+In order to account for this contribution set: \forcode{ln_zdfswm = .true.},
+then wave interaction has to be activated through \forcode{ln_wave = .true.},
+the Stokes Drift can be evaluated by setting \forcode{ln_sdw = .true.} 
+(see \autoref{subsec:SBC_wave_sdw})
+and the needed wave fields can be provided either in forcing or coupled mode
+(for more information on wave parameters and settings see \autoref{sec:SBC_wave})
 
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