/usr/share/code_saturne/user_examples/cs_user_electric_scaling.c is in code-saturne-data 4.3.3+repack-1build1.
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* Define scaling parameter for electric model
*============================================================================*/
/* Code_Saturne version 4.3.3 */
/*
This file is part of Code_Saturne, a general-purpose CFD tool.
Copyright (C) 1998-2015 EDF S.A.
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; either version 2 of the License, or (at your option) any later
version.
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., 51 Franklin
Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/*----------------------------------------------------------------------------*/
#include "cs_defs.h"
/*----------------------------------------------------------------------------
* Standard C library headers
*----------------------------------------------------------------------------*/
#include <math.h>
/*----------------------------------------------------------------------------
* Local headers
*----------------------------------------------------------------------------*/
#include "cs_base.h"
#include "cs_mesh.h"
#include "cs_math.h"
#include "cs_mesh_quantities.h"
#include "cs_elec_model.h"
#include "bft_mem.h"
#include "bft_printf.h"
#include "cs_field.h"
#include "cs_field_pointer.h"
#include "cs_parall.h"
/*----------------------------------------------------------------------------
* Header for the current file
*----------------------------------------------------------------------------*/
#include "cs_prototypes.h"
/*----------------------------------------------------------------------------*/
BEGIN_C_DECLS
/*----------------------------------------------------------------------------*/
/*!
* \file cs_user_electric_scaling.c
*
* \brief Define scaling parameter for electric model.
*
*/
/*----------------------------------------------------------------------------*/
/*============================================================================
* User function definitions
*============================================================================*/
/*----------------------------------------------------------------------------*/
/*!
* \brief Define scaling parameter for electric model.
*
* \param[in] mesh pointer to a cs_mesh_t structure
* \param[in,out] mesh_quantities pointer to a cs_mesh_quantities_t structure
* \param[in] dt pointer to a \ref cs_real_t
*
* These options allow defining the time step synchronization policy,
* as well as a time step multiplier.
*/
/*----------------------------------------------------------------------------*/
void
cs_user_scaling_elec(const cs_mesh_t *mesh,
const cs_mesh_quantities_t *mesh_quantities,
cs_real_t *dt)
{
BEGIN_EXAMPLE_SCOPE
/*! [electric_scaling] */
cs_lnum_t ncel = mesh->n_cells;
cs_lnum_t ncelet = mesh->n_cells_with_ghosts;
cs_real_t *xyzcen = mesh_quantities->cell_cen;
cs_real_t *volume = mesh_quantities->cell_vol;
cs_lnum_t nfac = mesh->n_i_faces;
const cs_real_3_t *surfac = (const cs_real_3_t *) mesh_quantities->b_face_normal;
const cs_real_3_t *cdgfac = (const cs_real_3_t *) mesh_quantities->i_face_cog;
cs_elec_option_t *elec_opt = cs_get_glob_elec_option();
const int kivisl = cs_field_key_id("scalar_diffusivity_id");
/* example of a restrike arc */
if (cs_glob_elec_option->ielarc >= 1) {
if (cs_glob_time_step->nt_cur <= 200)
elec_opt->couimp = 200.;
else if (cs_glob_time_step->nt_cur > 200 &&
cs_glob_time_step->nt_cur <= 400)
elec_opt->couimp = 200. + 2. * (cs_glob_time_step->nt_cur - 200);
else
elec_opt->couimp = 600.;
}
if (cs_glob_time_step->nt_cur < 400 ||
cs_glob_time_step->nt_cur == cs_glob_time_step->nt_prev + 1)
elec_opt->irestrike = 0;
double econs = 1.5e5;
double coepot = 0.;
double coepoa = 1.;
if (cs_glob_elec_option->irestrike) {
double amex = 1.e30;
double aiex = -1.e30;
double emax = 0.;
double *w1;
BFT_MALLOC(w1, ncelet, double);
int diff_id = cs_field_get_key_int(CS_FI_(curre, 0), kivisl);
cs_field_t *c_prop = NULL;
c_prop = cs_field_by_id(diff_id);
for (int iel = 0; iel < ncel; iel++) {
double xelec = CS_FI_(curre, 0)->val[iel] / c_prop->val[iel];
double yelec = CS_FI_(curre, 1)->val[iel] / c_prop->val[iel];
double zelec = CS_FI_(curre, 2)->val[iel] / c_prop->val[iel];
w1[iel] = pow(xelec * xelec + yelec * yelec + zelec * zelec, 0.5);
amex = CS_MIN(amex, w1[iel]);
aiex = CS_MAX(amex, w1[iel]);
}
cs_parall_min(1, CS_DOUBLE, &amex);
cs_parall_max(1, CS_DOUBLE, &aiex);
bft_printf("min and max for E : %14.5E %15.4E\n", amex, aiex);
if (aiex > econs) {
elec_opt->irestrike = 1;
elec_opt->ntdcla = cs_glob_time_step->nt_cur;
/* initialize restrike point coordinates */
elec_opt->restrike_point[0] = 1.e-8;
elec_opt->restrike_point[1] = 1.e-8;
elec_opt->restrike_point[2] = 1.e-8;
double diff = 0.;
double xyzmax[3] = {-1.e10, -1.e10, -1.e10};
for (int iel = 0; iel < ncel; iel++) {
diff = aiex - w1[iel];
if (diff < 1.e-6) {
emax = w1[iel];
xyzmax[0] = xyzcen[3 * iel ];
xyzmax[1] = xyzcen[3 * iel + 1];
xyzmax[2] = xyzcen[3 * iel + 2];
}
}
/* we can only have a single restrike point */
cs_parall_max_loc_vals(3, &emax, xyzmax);
elec_opt->restrike_point[0] = xyzmax[0];
elec_opt->restrike_point[1] = xyzmax[1];
elec_opt->restrike_point[2] = xyzmax[2];
bft_printf("restrike point : %14.5E %14.5E %14.5E\n",
elec_opt->restrike_point[0],
elec_opt->restrike_point[1],
elec_opt->restrike_point[2]);
}
BFT_FREE(w1);
if (cs_glob_time_step->nt_cur <= elec_opt->ntdcla + 30) {
double z1 = elec_opt->restrike_point[0] - 3.e-4;
double z2 = elec_opt->restrike_point[0] + 3.e-4;
if (z1 < 0.)
z1 = 0.;
if (z2 > 2.e-2)
z2 = 2.e-2;
for (int iel = 0; iel < ncel; iel++) {
if (xyzcen[3 * iel + 2] > z1 && xyzcen[3 * iel + 2] < z2) {
double rayo = elec_opt->restrike_point[0] * xyzcen[3 * iel ]
- elec_opt->restrike_point[1] * xyzcen[3 * iel + 1];
double denom = pow(elec_opt->restrike_point[0] * elec_opt->restrike_point[0]
+ elec_opt->restrike_point[1] * elec_opt->restrike_point[1], 0.5);
rayo /= denom;
rayo += (xyzcen[3 * iel + 2] - elec_opt->restrike_point[2]
* xyzcen[3 * iel + 2] - elec_opt->restrike_point[2]);
rayo = pow(rayo, 0.5);
double posi = elec_opt->restrike_point[0] * xyzcen[3 * iel];
if (rayo < 5.e-4 && posi <= 0.)
CS_F_(h)->val[iel] = 8.e7;
}
}
}
else {
elec_opt->irestrike = 0;
}
double somje = 0.;
for (int iel = 0; iel < ncel; iel++) {
somje += CS_F_(joulp)->val[iel] * volume[iel];
}
cs_parall_sum(1, CS_DOUBLE, &somje);
if (fabs(somje) > 1.-20)
coepot = cs_glob_elec_option->couimp * cs_glob_elec_option->pot_diff
/ CS_MAX(somje, cs_math_epzero);
bft_printf("imposed current %14.5E, Dpot %14.5E, Somje %14.5E\n",
cs_glob_elec_option->couimp,
cs_glob_elec_option->pot_diff,
somje);
double elcou = 0.;
for (int ifac = 0; ifac < nfac; ifac++) {
if (fabs(surfac[ifac][0]) < 1.e-8 && fabs(surfac[ifac][1]) < 1.e-8 &&
cdgfac[ifac][2] > 0.05e-2 && cdgfac[ifac][2] < 0.08e-2) {
int iel = mesh->i_face_cells[ifac][0];
elcou += CS_FI_(curre, 2)->val[iel] * surfac[ifac][2];
}
}
cs_parall_sum(1, CS_DOUBLE, &elcou);
if (fabs(elcou) > 1.e-6)
elcou = fabs(elcou);
else
elcou = 0.;
if (fabs(elcou) > 1.e20)
coepoa = cs_glob_elec_option->couimp / elcou;
coepot = coepoa;
double dtj = 1.e15;
double dtjm = dtj;
double delhsh = 0.;
double cdtj = 20.;
for (int iel = 0; iel < ncel; iel++) {
if (fabs(CS_F_(rho)->val[iel]) > 1.e-20)
delhsh = CS_F_(joulp)->val[iel] * dt[iel]
/ CS_F_(rho)->val[iel];
if (fabs(delhsh) > 1.e-20)
dtjm = CS_F_(h)->val[iel] / delhsh;
else
dtjm = dtj;
dtjm = fabs(dtjm);
dtj = CS_MIN(dtj, dtjm);
}
cs_parall_min(1, CS_DOUBLE, &dtj);
double cpmx = pow(cdtj * dtj, 0.5);
coepot = cpmx;
if (cs_glob_time_step->nt_cur > 3) {
if (coepoa > 1.05)
coepot = cpmx;
else
coepot = coepoa;
}
bft_printf(" Cpmx = %14.5E\n", cpmx);
bft_printf(" COEPOA = %14.5E\n", coepoa);
bft_printf(" COEPOT = %14.5E\n", coepot);
bft_printf(" Dpot rescaled = %14.5E\n",
cs_glob_elec_option->pot_diff * coepot);
/* scaling electric fields */
elec_opt->pot_diff *= coepot;
/* electric potential (for post treatment) */
for (int iel = 0; iel < ncel; iel++)
CS_F_(potr)->val[iel] *= coepot;
/* current density */
if (cs_glob_elec_option->ielarc > 0)
for (int i = 0; i < 3 ; i++)
for (int iel = 0; iel < 3 ; iel++)
CS_FI_(curre, i)->val[iel] *= coepot;
/* joule effect */
for (int iel = 0; iel < 3 ; iel++)
CS_F_(joulp)->val[iel] *= coepot * coepot;
}
/*! [electric_scaling] */
END_EXAMPLE_SCOPE
}
/*----------------------------------------------------------------------------*/
END_C_DECLS
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