CMS-Flow:Bottom Friction: Difference between revisions

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(Created page with '== Bottom Friction == '''Flow without Waves''' In the situation without waves, the bottom shear stress is calculated based on the quadratic formula <math> \tau_m = \tau_…')
 
(Created page with '== Bottom Friction == '''Flow without Waves''' In the situation without waves, the bottom shear stress is calculated based on the quadratic formula math \tau_m = \tau_…')
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In the situation without waves, the bottom shear stress is calculated based on the quadratic formula
In the situation without waves, the bottom shear stress is calculated based on the quadratic formula


       <math> \tau_m = \tau_c = c_b|U|U  </math>
       math \tau_m = \tau_c = c_b|U|U  /math


where <math> c_b </math> is the bottom friction coefficient, <math> U</math> is the depth-averaged current velocity.
where math c_b /math is the bottom friction coefficient, math U/math is the depth-averaged current velocity.


'''Flow with Waves'''
'''Flow with Waves'''
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In the case with waves, the bottom friction is calculated as
In the case with waves, the bottom friction is calculated as


<math> \tau_m = \tau_c = c_b|U|U  </math>
math \tau_m = \tau_c = c_b|U|U  /math

Revision as of 19:15, 5 May 2010

Bottom Friction

Flow without Waves

In the situation without waves, the bottom shear stress is calculated based on the quadratic formula

     math \tau_m = \tau_c = c_b|U|U  /math

where math c_b /math is the bottom friction coefficient, math U/math is the depth-averaged current velocity.

Flow with Waves

In the case with waves, the bottom friction is calculated as

math \tau_m = \tau_c = c_b|U|U /math