CMS-Flow:Wind Pressure: Difference between revisions

      $τ_{W i} = ρ_{a} C_{d} | W | W_{i}$  

      $C_{d} = (\frac{κ}{14.56 - 2 \ln W})^{2}$

Revision as of 14:49, 14 May 2010 view source Deleted (talk \| contribs) 3,976 edits →Wind ← Older edit		Revision as of 14:50, 14 May 2010 view source Deleted (talk \| contribs) 3,976 edits →Wind Newer edit →
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	The wind drag coefficient <math> C_d </math> is calculated using the Hsu (1988)		The wind drag coefficient <math> C_d </math> is calculated using the Hsu (1988)

	<math> C_d = \biggl ( \frac{\kappa}{14.56 - 2\~~log~~ W}\biggr ) ^2 </math>		<math> C_d = \biggl ( \frac{\kappa}{14.56 - 2 \ln W}\biggr ) ^2 </math>

Symbol	Description	Units
$τ_{W}$	Wind shear stress	Pa
$ρ_{a}$	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
$θ$	Wind direction	m/sec

Revision as of 14:50, 14 May 2010