Stepwise wind file

A stepwise wind is a wind which direction and / or angle will change at a given time. These can be defined by parameters as shown in the Stepwise wind part or imported from a file.  Importing and exporting files can be done using the corresponding icons, marked in red in the following picture:






The input file for a stepwise wind is composed of three columns: time, wind speed and wind angle. Comments can be written above the columns using the '#' symbol. The image below illustrates the format: 






To get an example of a Stepwise wind input file, it is recommended to export the default stepwise wind.


The input file shown in the picture above will give the following variations of wind speed and wind angle:



The equations that define the stepwise wind are given in the Theory manual, in the Stepwise Wind section. The definition of the wind angle can be found in the Theory manual as well, in the Wind angle section.

Note: the first temporal coordinate of the input file must be equal to 0. Otherwise, an error message will appear telling you to change it to 0.