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/*============================================================================
* Postprocessing utility functions.
*============================================================================*/
/*
This file is part of Code_Saturne, a general-purpose CFD tool.
Copyright (C) 1998-2016 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 <assert.h>
#include <math.h>
#include <string.h>
/*----------------------------------------------------------------------------
* Local headers
*----------------------------------------------------------------------------*/
#include "bft_mem.h"
#include "bft_printf.h"
#include "fvm_selector.h"
#include "cs_interface.h"
#include "cs_base.h"
#include "cs_field.h"
#include "cs_field_pointer.h"
#include "cs_gradient.h"
#include "cs_gradient.h"
#include "cs_gradient_perio.h"
#include "cs_join.h"
#include "cs_halo.h"
#include "cs_halo_perio.h"
#include "cs_math.h"
#include "cs_matrix_default.h"
#include "cs_mesh.h"
#include "cs_mesh_coherency.h"
#include "cs_mesh_location.h"
#include "cs_mesh_quantities.h"
#include "cs_parall.h"
#include "cs_parameters.h"
#include "cs_post.h"
#include "cs_prototypes.h"
#include "cs_renumber.h"
#include "cs_rotation.h"
#include "cs_time_step.h"
#include "cs_timer.h"
#include "cs_timer_stats.h"
#include "cs_turbomachinery.h"
/*----------------------------------------------------------------------------
* Header for the current file
*----------------------------------------------------------------------------*/
#include "cs_post_util.h"
/*----------------------------------------------------------------------------*/
BEGIN_C_DECLS
/*! \cond DOXYGEN_SHOULD_SKIP_THIS */
/*============================================================================
* Local structure definitions
*============================================================================*/
/*============================================================================
* Static global variables
*============================================================================*/
/*============================================================================
* Private function definitions
*============================================================================*/
/*! (DOXYGEN_SHOULD_SKIP_THIS) \endcond */
/*============================================================================
* Public function definitions
*============================================================================*/
/*----------------------------------------------------------------------------*/
/*!
* \brief Compute the head of a turbomachinery (total pressure increase)
*
* \param[in] criteria_in selection criteria of turbomachinery suction
* \param[in] location_in mesh location of turbomachinery suction
* \param[in] criteria_out selection criteria of turbomachinery discharge
* \param[in] location_out mesh location of turbomachinery discharge
*
* \return turbomachinery head
*/
/*----------------------------------------------------------------------------*/
cs_real_t
cs_post_turbomachinery_head(const char *criteria_in,
cs_mesh_location_type_t location_in,
const char *criteria_out,
cs_mesh_location_type_t location_out)
{
cs_mesh_t *mesh = cs_glob_mesh;
cs_mesh_quantities_t *mesh_quantities = cs_glob_mesh_quantities;
cs_real_t *total_pressure = cs_field_by_name("total_pressure")->val;
cs_real_3_t *vel = (cs_real_3_t *)CS_F_(u)->val;
cs_real_t *density = CS_F_(rho)->val;
cs_real_t pabs_in = 0.;
cs_real_t sum_in = 0.;
cs_real_t pabs_out = 0.;
cs_real_t sum_out = 0.;
for (int _n = 0; _n < 2; _n++) {
cs_lnum_t n_elts = 0;
cs_lnum_t *elt_list = NULL;
cs_real_t pabs = 0.;
cs_real_t sum = 0.;
cs_mesh_location_type_t location;
const char *criteria = NULL;
if (_n == 0) {
location = location_in;
criteria = criteria_in;
} else {
location = location_out;
criteria = criteria_out;
}
switch(location) {
case CS_MESH_LOCATION_CELLS:
BFT_MALLOC(elt_list, mesh->n_cells, cs_lnum_t);
cs_selector_get_cell_num_list(criteria, &n_elts, elt_list);
for (cs_lnum_t i = 0; i < n_elts; i++) {
cs_lnum_t cell_id = elt_list[i];
cs_real_t weight = mesh_quantities->cell_vol[cell_id];
pabs += weight*(total_pressure[cell_id] + 0.5*density[cell_id]*
cs_math_3_square_norm(vel[cell_id]));
sum += weight;
}
BFT_FREE(elt_list);
break;
case CS_MESH_LOCATION_BOUNDARY_FACES:
BFT_MALLOC(elt_list, mesh->n_b_faces, cs_lnum_t);
cs_selector_get_b_face_num_list(criteria, &n_elts, elt_list);
for (cs_lnum_t i = 0; i < n_elts; i++) {
cs_lnum_t face_id = elt_list[i];
cs_lnum_t cell_id = mesh->b_face_cells[face_id];
cs_real_t surf = mesh_quantities->b_face_surf[face_id];
pabs += surf*(total_pressure[cell_id] + 0.5*density[cell_id]
*cs_math_3_square_norm(vel[cell_id]));
sum += surf;
}
BFT_FREE(elt_list);
break;
case CS_MESH_LOCATION_INTERIOR_FACES:
BFT_MALLOC(elt_list, mesh->n_i_faces, cs_lnum_t);
cs_selector_get_i_face_num_list(criteria, &n_elts, elt_list);
for (cs_lnum_t i = 0; i < n_elts; i++) {
cs_lnum_t face_id = elt_list[i];
cs_lnum_t c_i = mesh->i_face_cells[face_id][0];
cs_lnum_t c_j = mesh->i_face_cells[face_id][1];
cs_real_t w = mesh_quantities->i_face_surf[face_id];
cs_real_t pt = w*total_pressure[c_i] + (1.-w)*total_pressure[c_j];
cs_real_t r = w*density[c_i] + (1.-w)*density[c_j];
cs_real_3_t v = {w*vel[c_i][0] + (1.-w)*vel[c_j][0],
w*vel[c_i][1] + (1.-w)*vel[c_j][1],
w*vel[c_i][2] + (1.-w)*vel[c_j][2]};
pabs += w*(pt + 0.5*r*cs_math_3_square_norm(v));
sum += w;
}
BFT_FREE(elt_list);
break;
default:
pabs = 0.;
sum = 1.;
bft_printf
(_("Warning: while post-processing the turbomachinery head.\n"
" Mesh location %d is not supported, so the computed head\n"
" is erroneous.\n"
" The %s parameters should be checked.\n"),
location, __func__);
break;
}
if (_n == 0) {
pabs_in = pabs;
sum_in = sum;
} else {
pabs_out = pabs;
sum_out = sum;
}
}
double _s[4] = {pabs_in, pabs_out, sum_in, sum_out};
cs_parall_sum(4, CS_DOUBLE, _s);
pabs_in = _s[0] / _s[2];
pabs_out = _s[1] / _s[3];
return pabs_out - pabs_in;
}
/*----------------------------------------------------------------------------*/
/*!
* \brief Compute the magnitude of a moment of force torque) given an
* axis and the stress on a specific boundary.
*
* \param[in] n_b_faces number of faces
* \param[in] b_face_list face list
* \param[in] axis axis
*
* \return couple about the axis
*/
/*----------------------------------------------------------------------------*/
cs_real_t
cs_post_moment_of_force(cs_lnum_t n_b_faces,
cs_lnum_t *b_face_list,
cs_real_3_t axis)
{
const cs_real_3_t *b_face_cog
= (const cs_real_3_t *)cs_glob_mesh_quantities->b_face_cog;
const cs_real_3_t *b_forces
= (const cs_real_3_t *)cs_field_by_name("boundary_forces")->val;
cs_real_3_t moment = {0., 0., 0.};
for (cs_lnum_t i = 0; i < n_b_faces; i++) {
cs_real_3_t m;
cs_lnum_t face_id = b_face_list[i];
cs_math_3_cross_product(b_face_cog[face_id], b_forces[face_id], m);
/* b_forces is the stress on the solid boundary,
thus it comes with a '-' sign here */
for (int j = 0; j < 3; j++)
moment[j] -= m[j];
}
cs_parall_sum(3, CS_DOUBLE, moment);
return cs_math_3_dot_product(moment, axis);
}
/*----------------------------------------------------------------------------*/
END_C_DECLS
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