Bottom Friction: Difference between revisions

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where
where
''<math>\rho = </math>'' water density (~1025 kg/m<sup>3</sup>)
c<sub>b</sub> = bed friction coefficient [-]
''<math>U =</math>'' current magnitude = \sqrt{U_i^2 + U_j^2}

Revision as of 19:26, 16 July 2014

Bottom Friction

The mean (short-wave averaged) bed shear stress, , is calculated as

(2-8)

where

nonlinear bottom friction enhancement factor [-]

current-related bed shear stress vector [Pa]

The current bed shear stress is given by

(2-9)

where

water density (~1025 kg/m3)

cb = bed friction coefficient [-]

current magnitude = \sqrt{U_i^2 + U_j^2}