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 one to
calculate vorticity, but no strain. The output can be generated as ASCII data
containing four columns or as GNUPlot Data format that allows one 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