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#!/bin/sh
#------------------------------------------------------------------------------
# ========= |
# \\ / F ield | OpenFOAM: The Open Source CFD Toolbox
# \\ / O peration | Website: https://openfoam.org
# \\ / A nd | Copyright (C) 2024-2025 OpenFOAM Foundation
# \\/ M anipulation |
#------------------------------------------------------------------------------
# License
# This file is part of OpenFOAM.
#
# OpenFOAM is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
# for more details.
#
# You should have received a copy of the GNU General Public License
# along with OpenFOAM. If not, see <http://www.gnu.org/licenses/>.
#
# Script
# UPlusYPlusGraph
#
# Description
# Plots a graph of UPlus vs yPlus for the moodyChart tutorial case
#
#------------------------------------------------------------------------------
usage() {
cat<<USAGE
Usage: ${0##*/} [OPTIONS] <time>
options:
-help | -h print the usage
Plots a graph of Uplus vs yPlus for the moodyChart tutorial case at the
specified <time>
USAGE
}
error() {
exec 1>&2
while [ "$#" -ge 1 ]; do echo "Error: $1"; shift; done
usage
exit 1
}
format () {
cat<<EOF
set term pngcairo size 750,500
set key right bottom
set key font ",16"
set notitle
set xlabel "y^{+}" font ",18"
set ylabel "U^{+}" font ",18"
set xrange [1:50000]
set xtics (1, 10, 100, 1000, 10000)
set yrange [0:35]
set ytics (0, 5, 10, 15, 20, 25, 30, 35)
set tics font ",16"
set logscale x
EOF
}
while [ "$#" -gt 0 ]
do
case "$1" in
-h | -help)
usage && exit 0
;;
-*)
error "invalid option '$1'"
;;
*)
break
;;
esac
done
[ $# -eq 1 ] || error "Number of argument ($#) /= 1"
printf "%f" "$1" > /dev/null 2>&1 || \
error "Argument '$1' must be a number (time)"
time="$1"
# Formatting defaults
ptFmt='lt 1 lw 2 ps 2'
lineFmt='lt 1 lw 1.5'
colLam='lc rgb "dark-spring-green"'
colTurb='lc rgb "dark-magenta"'
# Test if gnuplot is installed
! command -v gnuplot >/dev/null 2>&1 && \
echo 'gnuplot not found - skipping graph creation' && \
exit 1
# Plotting
gnuplot<<EOF
$(format)
deltaP = 6*(10**($time-7))
utau = sqrt(0.1*deltaP/4)
nu = 1e-6
kappa = 0.41
E = 9.8
set output 'Uprofile-$time.png'
plot [1:][0:] 'postProcessing/Uprofile/${time}/line.xy' \
using (\$1*utau/nu):(\$2/utau) \
title 'CFD' $ptFmt, \
(1/kappa)*log(E*x) \
title 'U^{+} = 1/{/Symbol k} ln(y^{+}) + B' $lineFmt $colTurb, \
x \
title 'U^{+} = y^{+}' $lineFmt $colLam
EOF