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/*
* Method of class Star_bhns to compute kinematic quantities
*
* (see file star_bhns.h for documentation).
*
*/
/*
* Copyright (c) 2005-2007 Keisuke Taniguchi
*
* This file is part of LORENE.
*
* LORENE is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* LORENE 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 LORENE; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
char star_bhns_kinema_C[] = "$Header: /cvsroot/Lorene/C++/Source/Star_bhns/star_bhns_kinema.C,v 1.4 2014/10/13 08:53:41 j_novak Exp $" ;
/*
* $Id: star_bhns_kinema.C,v 1.4 2014/10/13 08:53:41 j_novak Exp $
* $Log: star_bhns_kinema.C,v $
* Revision 1.4 2014/10/13 08:53:41 j_novak
* Lorene classes and functions now belong to the namespace Lorene.
*
* Revision 1.3 2014/10/06 15:13:16 j_novak
* Modified #include directives to use c++ syntax.
*
* Revision 1.2 2008/05/15 19:16:06 k_taniguchi
* Change of a parameter.
*
* Revision 1.1 2007/06/22 01:32:00 k_taniguchi
* *** empty log message ***
*
*
* $Header: /cvsroot/Lorene/C++/Source/Star_bhns/star_bhns_kinema.C,v 1.4 2014/10/13 08:53:41 j_novak Exp $
*
*/
// C++ headers
//#include <>
// C headers
#include <cmath>
// Lorene headers
#include "star_bhns.h"
#include "unites.h"
namespace Lorene {
void Star_bhns::kinema_bhns(bool kerrschild, const double& mass_bh,
const double& sepa, double omega,
double x_rot, double y_rot) {
// Fundamental constants and units
// -------------------------------
using namespace Unites ;
int nz = mp.get_mg()->get_nzone() ;
int nzm1 = nz - 1 ;
//----------------------
// Computation of B^i/N
//----------------------
// 1/ Computation of omega m^i
const Coord& xa = mp.xa ;
const Coord& ya = mp.ya ;
// bsn.change_triad(mp.get_bvect_cart()) ;
if (fabs(mp.get_rot_phi()) < 1.e-10) {
bsn.set(1) = - omega * (ya - y_rot) ;
bsn.set(2) = omega * (xa - x_rot) ;
bsn.set(3) = 0. ;
}
else {
bsn.set(1) = omega * (ya - y_rot) ;
bsn.set(2) = - omega * (xa - x_rot) ;
bsn.set(3) = 0. ;
}
bsn.std_spectral_base() ;
bsn.annule_domain(nzm1) ;
// 2/ Addition of shift_tot and division by lapse
for (int i=1; i<=3; i++) {
bsn.set(i) = confo_tot * ( bsn(i) + shift_tot(i) ) / lapconf_tot ;
}
bsn.std_spectral_base() ;
bsn.annule_domain(nzm1) ;
//-----------------------------------------------------
// Lorentz factor between the co-orbiting ---> gam0
// observer and the Eulerian one
// See Eq (23) and (24) from Gourgoulhon et al. (2001)
//-----------------------------------------------------
Scalar bsn2(mp) ;
bsn2 = bsn(1)%bsn(1) + bsn(2)%bsn(2) + bsn(3)%bsn(3) ;
bsn2.std_spectral_base() ;
if (kerrschild) {
double mass = ggrav * mass_bh ;
Scalar xx(mp) ;
xx = mp.x ;
xx.std_spectral_base() ;
Scalar yy(mp) ;
yy = mp.y ;
yy.std_spectral_base() ;
Scalar zz(mp) ;
zz = mp.z ;
zz.std_spectral_base() ;
double yns = mp.get_ori_y() ;
Scalar rbh(mp) ;
rbh = sqrt( (xx+sepa)*(xx+sepa) + (yy+yns)*(yy+yns) + zz*zz ) ;
rbh.std_spectral_base() ;
Vector ll(mp, CON, mp.get_bvect_cart()) ;
ll.set_etat_qcq() ;
ll.set(1) = (xx+sepa) / rbh ;
ll.set(2) = (yy+yns) / rbh ;
ll.set(3) = zz / rbh ;
ll.std_spectral_base() ;
Scalar msr(mp) ;
msr = mass / rbh ;
msr.std_spectral_base() ;
Scalar llbsn(mp) ;
llbsn = ll(1)%bsn(1) + ll(2)%bsn(2) + ll(3)%bsn(3) ;
llbsn.std_spectral_base() ;
Scalar tmp1(mp) ;
tmp1 = 2. * msr % llbsn % llbsn ;
tmp1.std_spectral_base() ;
gam0 = 1. / sqrt(1. - psi4*(bsn2+tmp1)) ;
gam0.std_spectral_base() ;
}
else { // Isotropic coordinates with the maximal slicing
gam0 = 1. / sqrt(1. - psi4%bsn2) ;
gam0.std_spectral_base() ;
}
//-----------------------
// Centrifugal potential
//-----------------------
pot_centri = - log( gam0 ) ;
pot_centri.annule_domain(nzm1) ;
pot_centri.std_spectral_base() ;
// The derived quantities are obsolete
// -----------------------------------
del_deriv() ;
}
}
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