Environment |
 
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Environment |
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Input: |
Description |
Gravity Constant: |
The acceleration due to gravity. |
Input: |
Description |
Air Density: |
The air density; a typical value is around 1.225 kg/m3. |
Air Kinematic Viscosity: |
The kinematic viscosity of the air (used in the Reynolds number calculation); a typical value is around 1.460E-5 m2/s. |
Speed of Sound in Air: |
The speed of sound in air (used in the Mach number calculation); a typical value is around 340.3 m/s. |
Atmospheric Pressure: |
The atmospheric pressure above the free surface. This is typically around 101,325 Pa. |
Vapour Pressure: |
The vapor pressure of the fluid. For seawater this is typically around 2,000 Pa. |
Fluid Depth: |
The distance from the hub center to the free surface. |
(a)The last three parameters (Atmospheric Pressure, Vapour Pressure & Fluid Depth) are only used when a Cavitation Check is enabled for MHK (Marine and Hydrokinetic Technology) turbines. As Flexcom is currently designed to work with wind turbines only, these options are not relevant.
Input: |
Description |
Water Depth: |
The water depth. |
Water Density: |
The mass density (mass per unit volume) of seawater. |
Input: |
Description |
Seabed Stiffness: |
The elastic stiffness per unit length of the seabed, in units of [Force]/[Distance]/[Distance]. |
Longitudinal Coefficient of Friction: |
The coefficient of friction in the longitudinal direction. For any lines which contact the seabed, the local longitudinal direction is parallel to the line axis, while the local transverse direction is perpendicular to it. |
Transverse Coefficient of Friction: |
The coefficient of friction in the transverse direction. |
(a)Refer to Seabed Interaction for further information.