Free Surface Elevation
Defines the height of the free surface from the global system origin. If the system origin is at the free surface, this entry should be specified as zero. If the system origin is at the sea bottom, this entry is equal to the water depth. By default, the first node in a CAESAR II model is at an elevation of zero. You can change the elevation by pressing [Alt-+G].
Kinematic Viscosity
Defines the kinematic viscosity of water. This value is used to determine the Reynolds number, which is subsequently used to determine the hydrodynamic coefficients Cd, Cm, and Cl. Typical values of kinematic viscosity for sea water display below.
Temp Deg (F) |
n(ft2/sec) |
Temp (C) |
n(m2/sec) |
---|---|---|---|
60 |
1.26e-5 |
15.556 |
1.17058e-6 |
50 |
1.46e-5 |
10.000 |
1.35639e-6 |
40 |
1.55e-5 |
4.444 |
1.44000e-6 |
30 |
2.00e-5 |
-1.111 |
1.85807e-6 |
Fluid Weight Density
Defines the weight density of the fluid. For sea water, this value is approximately .037037 pounds per cubic inch (.001025 kg/cm3, 1.0256SG).