Extract

Set extraction outputs, station locations, and wall-normal resolution for lst-tools extract.

Key	Type	Default	Description
`hdf5_out`	`str`	`extracted_baseflow.hdf5`	Output HDF5 baseflow file path
`profiles_out`	`str`	—	Output Tecplot profiles file path (omit to skip)
`wall_out`	`str`	—	Output Tecplot wall curve file path (omit to skip)
`surface`	`str`	auto	Surface side: `lower` or `upper`
`n_eta`	`int`	`200`	Wall-normal points per profile
`eta_max`	`float`	auto	Wall-normal extent in mesh length units
`eta_distribution`	`str`	`tanh`	Wall-normal point distribution: `uniform`, `cosine`, `tanh`, or `geometric`
`eta_stretch`	`float`	`2.0`	Stretching strength for the `tanh` distribution
`eta_wall_spacing`	`float`	—	First off-wall interval for the `geometric` distribution
`stations`	`list[float]`	—	Required streamwise x-coordinates unless supplied by CLI or `x_s`/`x_e`/`d_x`
`snap_to_wall`	`bool`	`false`	Snap requested x-coordinates to the nearest defined wall points
`all_wall_points`	`bool`	`false`	Extract one profile at every unique x-point on the selected wall branch; overrides station coordinates

[extract]
hdf5_out    = "extracted_baseflow.hdf5"
profiles_out = "profiles.dat"
wall_out    = "wall.dat"
surface     = "upper"
n_eta       = 200
eta_max     = 0.012
eta_distribution = "tanh"
eta_stretch = 2.0
eta_wall_spacing = ""
stations    = [0.10, 0.20, 0.30, 0.40, 0.50]
snap_to_wall = true
all_wall_points = false

Leave snap_to_wall = false to interpolate profiles at the exact requested x-coordinates. To ignore stations and extract the complete selected wall, set all_wall_points = true.

For geometric spacing, set eta_wall_spacing to the desired first interval. It must not exceed eta_max / (n_eta - 1) so intervals grow away from the wall.