| /*---------------------------------------------------------------------------*\ | |
| ========= | | |
| \\ / F ield | OpenFOAM: The Open Source CFD Toolbox | |
| \\ / O peration | Website: https://openfoam.org | |
| \\ / A nd | Copyright (C) 2017-2026 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/>. | |
| \*---------------------------------------------------------------------------*/ | |
| // * * * * * * * * * * * * * * * Member Functions * * * * * * * * * * * * * // | |
| template<class Type> | |
| inline Type Foam::Function1s::Square<Type>::value(const scalar x) const | |
| { | |
| const scalar phi = frequency_*(x - start_); | |
| const scalar fraction = phi - floor(phi); | |
| return | |
| amplitude_->value(x)*(fraction < dutyCycle_ ? 1 : -1) | |
| + level_->value(x); | |
| } | |
| template<class Type> | |
| inline Type Foam::Function1s::Square<Type>::derivative(const scalar x) const | |
| { | |
| return pTraits<Type>::zero; | |
| } | |
| template<class Type> | |
| inline Type Foam::Function1s::Square<Type>::integral | |
| ( | |
| const scalar x1, | |
| const scalar x2 | |
| ) const | |
| { | |
| if (!integrable_) | |
| { | |
| FatalErrorInFunction | |
| << "Integration is not defined for " << type() << " functions " | |
| << "unless the amplitude is constant" | |
| << exit(FatalError); | |
| } | |
| auto integral0 = [&](const scalar x) | |
| { | |
| const scalar phi = frequency_*(x - start_); | |
| const scalar fraction = phi - floor(phi); | |
| return | |
| (2*amplitude_->value(x)/frequency_) | |
| *( | |
| dutyCycle_*floor(phi + 1 - dutyCycle_) | |
| + fraction*(fraction < dutyCycle_ ? 1 : 0) | |
| - frequency_/2*x | |
| ); | |
| }; | |
| return integral0(x2) - integral0(x1) + level_->integral(x1, x2); | |
| } | |
| // ************************************************************************* // | |