# Changeset 11386

Ignore:
Timestamp:
2019-08-01T17:26:28+02:00 (21 months ago)
Message:

#2216, correct description of grid scale dependent mixing coefficient

File:
1 edited

### Legend:

Unmodified
 r11336 A_l = \left\{ \begin{aligned} & \frac{\max(e_1,e_2)}{e_{ref}} A_o^l           & \text{for laplacian operator } \\ & \frac{\max(e_1,e_2)^{3}}{e_{ref}^{3}} A_o^l          & \text{for bilaplacian operator } & \frac{1}{2} U_{scl}  \max(e_1,e_2)         & \text{for laplacian operator } \\ & \frac{1}{12} U_{scl}  \max(e_1,e_2)^{3}             & \text{for bilaplacian operator } \end{aligned} \right. where $e_{ref}$ is a reference grid size harcoded to a $1^{\circ}$ grid size (\ie $e_{ref}\approx 111 km$), and $A_o^l$ is the user defined mixing coefficient defined according to  \autoref{eq:constantah}. where $U_{scl}$ is a user defined velocity scale (\np{rn\_Ud}, \np{rn\_Uv}). This variation is intended to reflect the lesser need for subgrid scale eddy mixing where the grid size is smaller in the domain.