CMS-Flow:Wind Pressure: Difference between revisions

      $\tau _{Wi}=\rho _{a}C_{d}|W|W_{i}$

@@ Line 4: / Line 4: @@
 In CMS-Flow the wind shear stress is calculated as
-       <math> \tau_{Wx} = \rho_a C_d W^{2} sin(\theta) </math> ,  <math>  \tau_{Wx} = \rho_a C_d W^{2} cos (\theta) </math>
+       <math> \tau_{Wi} = \rho_a C_d |W| W_i </math>
 where
@@ Line 17: / Line 17: @@
 |-
 | <math>W</math> || 10-min averaged wind speed at 10 m above the sea surface || m/sec
+|-
+| <math>\theta</math> || Wind direction || m/sec
 |}
 ----
 [[CMS#Documentation_Portal | Documentation Portal]]

Symbol	Description	Units
$\tau _{W}$	Wind shear stress	Pa
$\rho _{a}$	Atmospheric density (~1.2 kg/m^3)	kg/m^3
$C_{d}$	Wind drag coefficient	none
$W$	10-min averaged wind speed at 10 m above the sea surface	m/sec
$\theta$	Wind direction	m/sec

Revision as of 14:44, 14 May 2010