| #!/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 | |
| # frictionFactorReGraph | |
| # | |
| # Description | |
| # Plots a graph of "frictionFactor" vs "Re" for the moodyChart tutorial | |
| # | |
| #------------------------------------------------------------------------------ | |
| ! command -v gnuplot >/dev/null 2>&1 && \ | |
| echo 'gnuplot not found - skipping graph creation' && \ | |
| exit 1 | |
| # Formatting | |
| format () { | |
| cat<<EOF | |
| set term pngcairo size 750,500 | |
| set key right top | |
| set notitle | |
| set xlabel "Reynolds number, Re (-)" | |
| set ylabel "Friction coefficient, f_{D} (-)" | |
| set xrange [100:1e8] | |
| set xtics (1e2, 1e3, 1e4, 1e5, 1e6, 1e7, 1e8) | |
| set format x "10^{%L}" | |
| set yrange [0.005:0.4] | |
| set ytics (0.005, 0.01, 0.02, 0.04, 0.08, 0.16, 0.32) | |
| set logscale xy | |
| EOF | |
| } | |
| ptFmt='lt 1 lw 2 ps 2' | |
| lineFmt='lt 1 lw 1.5' | |
| colLam='lc rgb "dark-spring-green"' | |
| colTurb='lc rgb "dark-magenta"' | |
| # Plotting | |
| gnuplot<<EOF | |
| $(format) | |
| Ks = 0 | |
| D = 0.1 | |
| f(x) = x > 2000 ? 1/(-1.8*log10((Ks/D/3.7)**1.11+(6.9/x)))**2 : 0 | |
| g(x) = x < 2000 ? 64/x : 0 | |
| set output 'moodyChart.png' | |
| plot 'postProcessing/0/frictionFactor/data' u 2:3 t 'Laminar CFD' $ptFmt $colLam, \ | |
| 'postProcessing/2/frictionFactor/data' u 2:3 t 'RAS CFD' $ptFmt $colTurb, \ | |
| g(x) t 'Laminar (64/x)' $lineFmt $colLam, \ | |
| f(x) t 'Turbulent (Haaland)' $lineFmt $colTurb | |
| EOF | |