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getting_started.rst

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Installation and Getting Started

HydroDyn is included in the OpenFAST software repository and consists of two major components:

  • hydrodyn_driver is the standalone HydroDyn executable
  • hydrodynlib is the OpenFAST module library; it is most commonly used when driven through the HydroDyn driver or the OpenFAST glue code

For installation instructions, see installation. In sections where an installation target can be specific, use hydrodyn_driver.

Running the HydroDyn Driver

The HydroDyn Driver has a simple command line interface:

hydrodyn_driver <input_file>

where input_file is the file described in hd-driver-input. Additional input files are required, including the hd-primary-input. The time-series output as well as other output from HydroDyn are described in hd-output.

Running HydroDyn coupled to OpenFAST

To run an OpenFAST simulation with the HydroDyn module enabled, the CompHydro flag must be switched on and the hd-primary-input path supplied in the OpenFAST primary input file:

# In the "Feature switches" section
1               CompHydro   - Compute hydrodynamic loads (switch) {0=None; 1=HydroDyn}

# In the "Input files" section
"HydroDyn.dat"  HydroFile   - Name of file containing hydrodynamic input parameters (quoted string)

The time-series output as well as other output from HydroDyn are described in hd-output.