navier_stokes_blocks/testsuite/nonlinear_time_dependent_navier_stokes/ud_functions.hpp

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/*!
 *  @file
 *  @brief File containing the boundary conditions for the Monolithic Test
 *
 *  @date 2009-04-09
 *  @author Paolo Crosetto <crosetto@iacspc70.epfl.ch>
 *
 *  @contributor Cristiano Malossi <cristiano.malossi@epfl.ch>
 *  @maintainer Paolo Crosetto <crosetto@iacspc70.epfl.ch>
 *
 *  Contains the functions to be assigned as boundary conditions, in the file boundaryConditions.hpp . The functions
 *  can depend on time and space, while they can take in input an ID specifying one of the three principal axis
 *  if the functions to assign is vectorial and the boundary condition is of type \c Full \c.
 */

#ifndef UDFNS_HPP
#define UDFNS_HPP

// LifeV includes
#include <lifev/core/LifeV.hpp>

namespace LifeV
{

Real fZero (const Real& /*t*/, const Real& /*x*/, const Real& /*y*/, const Real& /*z*/, const ID& /*i*/)
{
    return 0.0;
}

Real fPressure (const Real& /*t*/, const Real& /*x*/, const Real& /*y*/, const Real& /*z*/, const ID& /*i*/)
{
    return 10.0;
}

Real inflow (const Real& /*t*/, const Real& x, const Real& y, const Real& /*z*/, const ID& i)
{
    double r = std::sqrt (x * x + y * y);
    double D = 1.0;
    double Re = 1.0;
    double nu = 0.035;

    if (i == 2)
    {
        return 90 *3 * nu * Re / D / 2 * 2 * ( (D / 2.) * (D / 2.) - r * r);
    }

    return 0.;
}

}



#endif