NAME
gpiv_vorty - Calculates the differential quantities vorticity, shear
strain and normal strain from PIV data.
SYNOPSIS
gpiv_vorty [-d N] [-h | --help] [-p | --print] [-g | --g] [--no_g ] [-v
| --version] [filename] < stdin > stdout
DESCRIPTION
gpiv_vorty calculates the differential quantities like vorticity, shear
strain and normal strain from PIV data. You can choose from several
differential schemes: central differentiation, least squares,
Richardson extrapolation and circulation method. Circulation method
only allows to calculate vorticity, but no strain. The output can be
generated as ASCII data containing four columns or as GNUPlot Data
format that allows to view/print the data as contour plots.
The configuration parameters (containing the POST key) may be overruled
by the command line options, as explained below.
Options
-d N Differential type to be used: central difference (N=0), least
squares (N=1), Richardson interpolation (N=2), circulation
method (N=3)
-h | --help
On-line help
-p | --print
Print parameters, command line options and eventually used input
and output filenames to stdout. The output is identic of
filename.par, in case filename is used.
-g Show contour plot of the output with gnuplot.
--no_g Suppresses to show contour plot of the output with gnuplot.
-v | --version
Print version information on standard output, then exit
successfully.
filename
Input PIV data file. Overrides stdin and stdout. The output will
be written to filename.vor. Parameters are stored in
filename.par and may be used for future use by including them in
./gpivrc.
SEE ALSO
gpivtools
AUTHOR
Gerber Van der Graaf
8 November 2006