CMS-Flow:Ripple Dimensions

The bed forms calculated by CMS are the wave- and current-related ripples. The ripple height (used to calculate the mixing layer thickness) is estimated as the maximum of the current- and wave-related ripple heights

$H_r=max(H_{r,c},H_{r,w})$

(1)

The current-related ripple height and length are calculated as (Soulsby 1997)

$H_{r,c}=L_{r,c}/7$

(2)

$L_{r,c}=1000d_{50}$

(3)

The wave-related ripple height and length are calculated using the expressions proposed by van Rijn (1984b, 1989):

$H_{r,w}=\{\begin{array}{rl}& 0.22A_{w}for{\psi }_w<10\\ & 2.8x10^{-13}(250-{\psi }_w{)}^5{A}_{w}for10\le {\psi }_w<250\\ & 0for250\le {\psi }_w\end{array}$

(4)

References

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