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/* (c) 2009 Erik Schnetter
* (c) 2010 Frank Loeffler */
#include <cstdio>
#include <cassert>
#include <vector>
#include <ios>
#include <cctk.h>
#include <cctk_Arguments.h>
#include <cctk_Parameters.h>
#include <bin_ns.h>
#include <unites.h>
using namespace std;
static void set_dt_from_domega (CCTK_ARGUMENTS,
CCTK_REAL const* const var,
CCTK_REAL * const dtvar,
CCTK_REAL const& omega)
{
DECLARE_CCTK_ARGUMENTS;
int const npoints = cctk_lsh[0] * cctk_lsh[1] * cctk_lsh[2];
vector<CCTK_REAL> dxvar(npoints), dyvar(npoints);
Diff_gv (cctkGH, 0, var, &dxvar[0], -1);
Diff_gv (cctkGH, 1, var, &dyvar[0], -1);
#pragma omp parallel for
for (int i=0; i<npoints; ++i) {
CCTK_REAL const ephix = +y[i];
CCTK_REAL const ephiy = -x[i];
CCTK_REAL const dphi_var = ephix * dxvar[i] + ephiy * dyvar[i];
dtvar[i] = omega * dphi_var;
}
}
extern "C"
void Meudon_Bin_NS_initialise (CCTK_ARGUMENTS)
{
DECLARE_CCTK_ARGUMENTS;
DECLARE_CCTK_PARAMETERS;
CCTK_INFO ("Setting up LORENE Bin_NS initial data");
// Meudon data are distributed in SI units (MKSA). Here are some
// conversion factors.
// Be aware: these are the constants Lorene uses. They do differ from other
// conventions, but they gave the best results in some tests.
CCTK_REAL const c_light = Unites::c_si; // speed of light [m/s]
CCTK_REAL const nuc_dens = Unites::rhonuc_si; // Nuclear density as used in Lorene units [kg/m^3]
CCTK_REAL const G_grav = Unites::g_si; // gravitational constant [m^3/kg/s^2]
CCTK_REAL const M_sun = Unites::msol_si; // solar mass [kg]
// Cactus units in terms of SI units:
// (These are derived from M = M_sun, c = G = 1, and using 1/M_sun
// for the magnetic field)
CCTK_REAL const cactusM = M_sun;
CCTK_REAL const cactusL = cactusM * G_grav / pow(c_light,2);
CCTK_REAL const cactusT = cactusL / c_light;
// Other quantities in terms of Cactus units
CCTK_REAL const coord_unit = cactusL / 1.0e+3; // from km (~1.477)
CCTK_REAL const rho_unit = cactusM / pow(cactusL,3); // from kg/m^3
CCTK_INFO ("Setting up coordinates");
int const npoints = cctk_lsh[0] * cctk_lsh[1] * cctk_lsh[2];
vector<double> xx(npoints), yy(npoints), zz(npoints);
#pragma omp parallel for
for (int i=0; i<npoints; ++i) {
xx[i] = x[i] * coord_unit;
yy[i] = y[i] * coord_unit;
zz[i] = z[i] * coord_unit;
}
CCTK_VInfo (CCTK_THORNSTRING, "Reading from file \"%s\"", filename);
try {
Bin_NS bin_ns (npoints, &xx[0], &yy[0], &zz[0], filename);
CCTK_VInfo (CCTK_THORNSTRING, "omega [rad/s]: %g", bin_ns.omega);
CCTK_VInfo (CCTK_THORNSTRING, "dist [km]: %g", bin_ns.dist);
CCTK_VInfo (CCTK_THORNSTRING, "dist_mass [km]: %g", bin_ns.dist_mass);
CCTK_VInfo (CCTK_THORNSTRING, "mass1_b [M_sun]: %g", bin_ns.mass1_b);
CCTK_VInfo (CCTK_THORNSTRING, "mass2_b [M_sun]: %g", bin_ns.mass2_b);
CCTK_VInfo (CCTK_THORNSTRING, "mass_ADM [M_sun]: %g", bin_ns.mass_adm);
CCTK_VInfo (CCTK_THORNSTRING, "L_tot [G M_sun^2/c]: %g", bin_ns.angu_mom);
CCTK_VInfo (CCTK_THORNSTRING, "rad1_x_comp [km]: %g", bin_ns.rad1_x_comp);
CCTK_VInfo (CCTK_THORNSTRING, "rad1_y [km]: %g", bin_ns.rad1_y);
CCTK_VInfo (CCTK_THORNSTRING, "rad1_z [km]: %g", bin_ns.rad1_z);
CCTK_VInfo (CCTK_THORNSTRING, "rad1_x_opp [km]: %g", bin_ns.rad1_x_opp);
CCTK_VInfo (CCTK_THORNSTRING, "rad2_x_comp [km]: %g", bin_ns.rad2_x_comp);
CCTK_VInfo (CCTK_THORNSTRING, "rad2_y [km]: %g", bin_ns.rad2_y);
CCTK_VInfo (CCTK_THORNSTRING, "rad2_z [km]: %g", bin_ns.rad2_z);
CCTK_VInfo (CCTK_THORNSTRING, "rad2_x_opp [km]: %g", bin_ns.rad2_x_opp);
double K = bin_ns.kappa_poly1 * pow(c_light, 6.0) /
( pow(G_grav, 3.0) * M_sun * M_sun *
pow(nuc_dens, bin_ns.gamma_poly1-1.) );
CCTK_VInfo (CCTK_THORNSTRING, "K [ET unit]: %.15g", K);
assert (bin_ns.np == npoints);
CCTK_INFO ("Filling in Cactus grid points");
#pragma omp parallel for
for (int i=0; i<npoints; ++i) {
if (CCTK_EQUALS(initial_lapse, "Meudon_Bin_NS")) {
alp[i] = bin_ns.nnn[i];
}
if (CCTK_EQUALS(initial_shift, "Meudon_Bin_NS")) {
betax[i] = -bin_ns.beta_x[i];
betay[i] = -bin_ns.beta_y[i];
betaz[i] = -bin_ns.beta_z[i];
}
if (CCTK_EQUALS(initial_data, "Meudon_Bin_NS")) {
gxx[i] = bin_ns.g_xx[i];
gxy[i] = bin_ns.g_xy[i];
gxz[i] = bin_ns.g_xz[i];
gyy[i] = bin_ns.g_yy[i];
gyz[i] = bin_ns.g_yz[i];
gzz[i] = bin_ns.g_zz[i];
kxx[i] = bin_ns.k_xx[i] * coord_unit;
kxy[i] = bin_ns.k_xy[i] * coord_unit;
kxz[i] = bin_ns.k_xz[i] * coord_unit;
kyy[i] = bin_ns.k_yy[i] * coord_unit;
kyz[i] = bin_ns.k_yz[i] * coord_unit;
kzz[i] = bin_ns.k_zz[i] * coord_unit;
}
if (CCTK_EQUALS(initial_data, "Meudon_Bin_NS")) {
rho[i] = bin_ns.nbar[i] / rho_unit;
eps[i] = bin_ns.ener_spec[i];
// The following would recompute eps using the polytopic EOS, but
// setting eps directly seems to work as well
// eps[i] = K * pow(rho[i], bin_ns.gamma_poly1-1.) / (bin_ns.gamma_poly1-1.);
// TODO: we should really use some EOS calls for the pressure, but for the
// moment this works with polytropes at least
press[i] = K * pow(rho[i], bin_ns.gamma_poly1);
vel[i ] = bin_ns.u_euler_x[i];
vel[i+ npoints] = bin_ns.u_euler_y[i];
vel[i+2*npoints] = bin_ns.u_euler_z[i];
// Especially the velocity is set to strange values outside of the
// matter region, so take care of this in the following way
if (rho[i] < 1.e-20) {
rho[i ] = 1.e-20;
vel[i ] = 0.0;
vel[i+ npoints] = 0.0;
vel[i+2*npoints] = 0.0;
eps[i ] = K * pow(rho[i], bin_ns.gamma_poly1-1.) / (bin_ns.gamma_poly1-1.);
press[i ] = K * pow(rho[i], bin_ns.gamma_poly1);
}
}
} // for i
{
// Angular velocity
CCTK_REAL const omega = bin_ns.omega * cactusT;
// These initial data assume a helical Killing vector field
if (CCTK_EQUALS(initial_lapse, "Meudon_Bin_NS")) {
if (CCTK_EQUALS (initial_dtlapse, "Meudon_Bin_NS")) {
CCTK_INFO ("Calculating time derivatives of lapse");
set_dt_from_domega (CCTK_PASS_CTOC, alp, dtalp, omega);
} else if (CCTK_EQUALS (initial_dtlapse, "none")) {
// do nothing
} else {
CCTK_WARN (CCTK_WARN_ABORT, "internal error");
}
}
if (CCTK_EQUALS(initial_shift, "Meudon_Bin_NS")) {
if (CCTK_EQUALS (initial_dtshift, "Meudon_Bin_NS")) {
CCTK_INFO ("Calculating time derivatives of shift");
set_dt_from_domega (CCTK_PASS_CTOC, betax, dtbetax, omega);
set_dt_from_domega (CCTK_PASS_CTOC, betay, dtbetay, omega);
set_dt_from_domega (CCTK_PASS_CTOC, betaz, dtbetaz, omega);
} else if (CCTK_EQUALS (initial_dtshift, "none")) {
// do nothing
} else {
CCTK_WARN (CCTK_WARN_ABORT, "internal error");
}
}
}
CCTK_INFO ("Done.");
} catch (ios::failure e) {
CCTK_VWarn (CCTK_WARN_ABORT, __LINE__, __FILE__, CCTK_THORNSTRING,
"Could not read initial data from file '%s': %s", filename, e.what());
}
}
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