Template:Gravity Waves Time Step

Gravity Waves Time Step

The toolbox includes a tool for calculating the time step given the Courant number.

Note: the variable here is depth, not elevation. For applications relative to mean sea level, using the negative of the elevation relative to a datum is acceptable, but if the water level will vary, the depth is actually the water level minus the ground elevation

${\displaystyle TimeStep=CourantNumber*NodalSpacing/(Gravity*Depth)^{0.5}}$

The Gravity Waves Time Step tool dialog has the following options:

• Input dataset – This is a required input parameter. Specify which depth dataset will be used to generate the gravity wave time step dataset.
• Gravity – Enter the gravity value.
• Use courant number – Enter the Courant number.
• Gravity waves time step dataset – Enter the name for the new gravity wave time step dataset.