File size: 4,214 Bytes
5a600cf | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 | /*---------------------------------------------------------------------------*\
========= |
\\ / F ield | OpenFOAM: The Open Source CFD Toolbox
\\ / O peration | Website: https://openfoam.org
\\ / A nd | Copyright (C) 2011-2026 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/>.
Application
Test-Function1
Description
Tests Function1
\*---------------------------------------------------------------------------*/
#include "argList.H"
#include "Function1.H"
#include "IFstream.H"
#include "OFstream.H"
using namespace Foam;
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
int main(int argc, char *argv[])
{
argList::validArgs.append("dictionary");
argList args(argc, argv);
const word dictName(args[1]);
Info<< "Reading " << dictName << nl << endl;
const dictionary dict = IFstream(dictName)();
Info<< "Constructing the function\n" << endl;
const autoPtr<Function1<scalar>> functionPtr =
Function1<scalar>::New("function", units::none, units::none, dict);
const Function1<scalar>& function = functionPtr();
const bool derivative = dict.lookupOrDefault<bool>("derivative", true);
const bool integral = dict.lookupOrDefault<bool>("integral", true);
const scalar x0 = dict.lookup<scalar>("x0");
const scalar x1 = dict.lookup<scalar>("x1");
const label nX = dict.lookup<label>("nX");
const scalar dx = (x1 - x0)/(nX - 1);
const scalarField xs(x0 + (x1 - x0)*linearSequence01(nX));
Info<< "Calculating values\n" << endl;
const scalarField ys(function.value(xs));
tmp<scalarField> derivativeYs
(
derivative
? function.derivative(xs)
: tmp<scalarField>()
);
tmp<scalarField> integralYs
(
integral
? function.integral(scalarField(nX, x0), xs)
: tmp<scalarField>()
);
tmp<scalarField> finiteDerivativeYs;
tmp<scalarField> trapezoidIntegralYs;
if (derivative)
{
finiteDerivativeYs = tmp<scalarField>(new scalarField(nX, 0));
finiteDerivativeYs.ref().first() =
(-3*ys[0] + 4*ys[1] - ys[2])/(2*dx);
for (label i = 1; i < nX-1; ++ i)
{
finiteDerivativeYs.ref()[i] = (ys[i+1] - ys[i-1])/(2*dx);
}
finiteDerivativeYs.ref().last() =
(3*ys[nX-1] - 4*ys[nX-2] + ys[nX-3])/(2*dx);
}
if (integral)
{
trapezoidIntegralYs = tmp<scalarField>(new scalarField(nX, 0));
for (label i = 1; i < nX; ++ i)
{
trapezoidIntegralYs.ref()[i] =
trapezoidIntegralYs.ref()[i-1] + (ys[i] + ys[i-1])/2*dx;
}
}
OFstream ofs(dictName + ".dat");
Info<< "Writing to " << ofs.name() << "\n" << endl;
ofs << "# x y";
if (derivative)
{
ofs << " derivativeY finiteDerivativeY";
}
if (integral)
{
ofs << " integralY trapezoidIntegralY";
}
ofs << nl;
forAll(xs, i)
{
ofs << xs[i] << ' ' << ys[i];
if (derivative)
{
ofs << ' ' << derivativeYs()[i] << ' ' << finiteDerivativeYs()[i];
}
if (integral)
{
ofs << ' ' << integralYs()[i] << ' ' << trapezoidIntegralYs()[i];
}
ofs << nl;
}
Info<< "End\n" << endl;
return 0;
}
// ************************************************************************* //
|