hfluid.h

Go to the documentation of this file.

/* $Header: /var/cvs/mbdyn/mbdyn/mbdyn-1.0/mbdyn/hydr/hfluid.h,v 1.25 2017/01/12 14:46:32 masarati Exp $ */
/*
 * MBDyn (C) is a multibody analysis code.
 * http://www.mbdyn.org
 *
 * Copyright (C) 1996-2017
 *
 * Pierangelo Masarati  <masarati@aero.polimi.it>
 * Paolo Mantegazza     <mantegazza@aero.polimi.it>
 *
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 * via La Masa, 34 - 20156 Milano, Italy
 * http://www.aero.polimi.it
 *
 * Changing this copyright notice is forbidden.
 *
 * This program 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 (version 2 of the License).
 *
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * Copyright 1999-2000 Lamberto Puggelli <puggelli@tiscalinet.it>
 * Dipartimento di Ingegneria Aerospaziale - Politecnico di Milano
 */

#ifndef HFLUID_H
#define HFLUID_H

#include "ac/f2c.h"

#include "withlab.h"

/* HydraulicFluid - begin */

class HydraulicFluid : public WithLabel {
protected:
        const doublereal dPres0;
        const doublereal dTemp0;

public:
        HydraulicFluid(unsigned int Label,
                const doublereal dPres0 = -1.,
                const doublereal dTemp0 = -1.);
        HydraulicFluid(const HydraulicFluid& HF);

        virtual ~HydraulicFluid();

        /* crea una copia dell'HF */
        virtual HydraulicFluid* pCopy(void) const = 0;

        /* funzioni relative alla densita'; possono essere usate senza argomenti
         * (fluido incomprimibile), con un argomento, o con due (effetto di T) */
        virtual doublereal dGetDensity(void) const = 0;
        virtual doublereal dGetDensity(const doublereal& dPres) const = 0;
        virtual doublereal dGetDensity(const doublereal& dPres,
                const doublereal& dTemp) const = 0;
        virtual doublereal dGetDensityDPres(void) const = 0;
        virtual doublereal dGetDensityDPres(const doublereal& dPres) const = 0;
        virtual doublereal dGetDensityDPres(const doublereal& dPres,
                const doublereal& dTemp) const = 0;
        virtual doublereal dGetDensityDTemp(void) const = 0;
        virtual doublereal dGetDensityDTemp(const doublereal& dPres) const = 0;
        virtual doublereal dGetDensityDTemp(const doublereal& dPres,
                const doublereal& dTemp) const = 0;
        virtual doublereal dGetViscosity(void) const = 0;
        virtual doublereal dGetViscosity(const doublereal& dPres) const = 0;
        virtual doublereal dGetViscosity(const doublereal& dPres,
                const doublereal& dTemp) const = 0;

        enum Re { UPPER, LOWER };
        virtual inline doublereal dGetRe(Re which);

#if 0
        virtual doublereal dGetRe(Re which, const doublereal& dPres) = 0;
        virtual doublereal dGetRe(Re which, const doublereal& dPres,
                const doublereal& dTemp) = 0;
#endif

        virtual doublereal dGetPres0(void) const;
        virtual doublereal dGetTemp0(void) const;
};

inline doublereal
HydraulicFluid::dGetRe(HydraulicFluid::Re which)
{
        switch (which) {
        case HydraulicFluid::LOWER:
                return 2000.;

        case HydraulicFluid::UPPER:
                return 4000.;

        default:
                throw ErrGeneric(MBDYN_EXCEPT_ARGS);
        }
}

/* legge un fluido idraulico; non va usata direttamente, viene invece
 * gestita dal parser specializzato di MBDyn, MBDynParser (mbpar.h) */
class MBDynParser;
extern HydraulicFluid * ReadHydraulicFluid(MBDynParser& HP, unsigned int uLabel);

/* HydraulicFluid - end */

#endif /* HFLUID_H */