Bug description
I'm running OLAF by means of the AeroDyn standalone driver and requesting some velocity outputs. I'm requesting the wind data from TSart = 1.00 s.
--------------------------- OUTPUT OPTIONS (wake visualizations) ---------------------------------------------------
0 WrVTk Outputs Visualization Toolkit (VTK) (independent of .fst option) {0: NoVTK, 1: Write VTK in the folder vtk_fvw at each time step defined in VTK_fps, 2: outputs at time steps defined by VTK_fps, but ensures that a file is written at the beginning and the end of the simulation (typically used with VTK_fps=0)} (flag)
0 nVTKBlades Number of blades for which VTK files are exported {0: No VTK per blade, n: VTK for blade 1 to n} (-)
1 VTKCoord Coordinate system used for VTK export. {1: Global, 2: Hub, default: 1}
0 VTK_fps Frame rate for VTK output (frames per second) {"all" for all glue code timesteps (1/DTAero in a AeroDyn input file), default for all OLAF timesteps} [used only if WrVTK=1]. It has to be a multiple of 1/DTfvw.
1 nGridOut Number of grid outputs (the result is written down in the vtk_fvw folder using the name used in GridName below).
GridName GridType (1 = velocity, 2 = velocity and vorticity) TStart TEnd DTOut (all = AeroDyn time step, default: OLAF time step) XStart XEnd nX YStart YEnd nY ZStart ZEnd nZ
(-) (-) (s) (s) (s) (m) (m) (-) (m) (m) (-) (m) (m) (-)
"2D" 1 1.00 2.00 0.02 4.6242 4.6242 1 -2.5 2.5 51 2.18843 2.18843 1
Since I'm using a time step that is 0.002 s, I would expect that the first file written down corresponds to the step 500 (1/0.002).
However, when reaching t = 1.00 s, OLAF writes the first file as 000000000.vtk (instead of 000000500.vtk) and the second file as 000000510.vtk. I understand that this second file is the proper one taking place at instant t = 1.02 s (step = 1.02/0.002 = 510). See below for reference:
This is a bit confusing down the road for bookkeeping purposes.
OpenFAST Version
I'm using AeroDyn standalone from OpenFAST v5.0.0.
Bug description
I'm running OLAF by means of the AeroDyn standalone driver and requesting some velocity outputs. I'm requesting the wind data from
TSart= 1.00 s.Since I'm using a time step that is 0.002 s, I would expect that the first file written down corresponds to the step 500 (1/0.002).
However, when reaching t = 1.00 s, OLAF writes the first file as 000000000.vtk (instead of 000000500.vtk) and the second file as 000000510.vtk. I understand that this second file is the proper one taking place at instant t = 1.02 s (step = 1.02/0.002 = 510). See below for reference:
This is a bit confusing down the road for bookkeeping purposes.
OpenFAST Version
I'm using AeroDyn standalone from OpenFAST v5.0.0.