exponentialSqrRamp.H

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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.
 
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Class
    Foam::Function1s::exponentialSqrRamp
 
Description
    Exponential square ramp function starting from 0 and increasing to 1 from \c
    start over the \c duration and remaining at 1 thereafter:
 
    \f[
        value(t) = (e^(((t - start)/duration)^2) - 1)/(e - 1)
    \f]
 
See also
    Foam::Function1s::Ramp
 
SourceFiles
    exponentialSqrRamp.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef exponentialSqrRamp_H
#define exponentialSqrRamp_H
 
#include "Ramp.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace Function1s
{
 
/*---------------------------------------------------------------------------*\
                       Class exponentialSqrRamp Declaration
\*---------------------------------------------------------------------------*/
 
class exponentialSqrRamp
:
    public Ramp<exponentialSqrRamp>
{
 
public:
 
    // Runtime type information
    TypeName("exponentialSqrRamp");
 
 
    // Constructors
 
        //- Construct from name and dictionary
        exponentialSqrRamp
        (
            const word& name,
            const unitConversions& units,
            const dictionary& dict
        );
 
 
    //- Destructor
    virtual ~exponentialSqrRamp();
 
 
    // Member Functions
 
        //- Return value for time t
        virtual inline scalar value(const scalar t) const;
 
        //- Return the integral between times t1 and t2
        virtual inline scalar integral
        (
            const scalar t1,
            const scalar t2
        ) const;
 
 
    // Member Operators
 
        //- Disallow default bitwise assignment
        void operator=(const exponentialSqrRamp&) = delete;
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Function1s
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#include "exponentialSqrRampI.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //