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):

$H_{r,w}=\left\{{\begin{aligned}&0.22A_{w}\quad \quad for\ \psi _{w}<10\\&2.8\ x\ 10^{-13}(250-\psi _{w})^{5}A_{w}\quad for\ 10\quad \leq \psi _{w}<250\\&0\quad \quad \quad \quad \quad for\ 250\leq \psi _{w}\end{aligned}}\right.$

(4)

References

---

Documentation Portal