/usr/share/code_saturne/user_examples/cs_user_mesh-periodicity.c is in code-saturne-data 4.3.3+repack-1build1.
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* Definition of the calculation mesh.
*
* Mesh-related user functions (called in this order):
* 1) Manage the exchange of data between Code_Saturne and the pre-processor
* 2) Define (conforming or non-conforming) mesh joinings.
* 3) Define (conforming or non-conforming) periodicity.
* 4) Define thin walls.
* 5) Modify the geometry and mesh.
* 6) Smoothe the mesh.
*============================================================================*/
/* Code_Saturne version 4.3.3 */
/*
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 <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
/*----------------------------------------------------------------------------
* Local headers
*----------------------------------------------------------------------------*/
#include "bft_error.h"
#include "bft_mem.h"
#include "bft_printf.h"
#include "fvm_defs.h"
#include "fvm_selector.h"
#include "cs_base.h"
#include "cs_join.h"
#include "cs_join_perio.h"
#include "cs_mesh.h"
#include "cs_mesh_quantities.h"
#include "cs_mesh_bad_cells.h"
#include "cs_mesh_extrude.h"
#include "cs_mesh_smoother.h"
#include "cs_mesh_thinwall.h"
#include "cs_mesh_warping.h"
#include "cs_parall.h"
#include "cs_post.h"
#include "cs_preprocessor_data.h"
#include "cs_selector.h"
/*----------------------------------------------------------------------------
* Header for the current file
*----------------------------------------------------------------------------*/
#include "cs_prototypes.h"
/*----------------------------------------------------------------------------*/
BEGIN_C_DECLS
/*----------------------------------------------------------------------------*/
/*!
* \file cs_user_mesh-periodicity.c
*
* \brief Mesh periodicity example
*
* See \subpage cs_user_mesh for examples.
*/
/*----------------------------------------------------------------------------*/
/*============================================================================
* User function definitions
*============================================================================*/
/*----------------------------------------------------------------------------*/
/*! \brief Define periodic faces.
*
* This is done by calling one of the cs_join_perio_add_*() functions for
* each periodicity to add.
*
* The first arguments to cs_join_perio_add_() are the same as for
* mesh joining:
* sel_criteria <-- boundary face selection criteria string
* fraction <-- value of the fraction parameter;
* the initial tolerance radius associated to each vertex
* is equal to the lenght of the shortest incident edge,
* multiplied by this fraction.
* plane <-- value of the plane parameter;
* when subdividing faces, 2 faces are considered
* coplanar and may be joined if angle between their
* normals (in degrees) does not exceed this parameter.
* verbosity <-- level of verbosity required
*
* The last arguments depend on the type of periodicity to define,
* and are described below.
*
* The function returns a number (1 to n) associated with the
* new joining. This number may optionnally be used to assign advanced
* parameters to the joining.
*/
/*----------------------------------------------------------------------------*/
void
cs_user_periodicity(void)
{
/* Example 1: define a periodicity of translation */
/* ---------------------------------------------- */
BEGIN_EXAMPLE_SCOPE
/*! [mesh_periodicity_1] */
int join_num;
int verbosity = 1; /* per-task dump if > 1, debug level if >= 3 */
int visualization = 1; /* debug level if >= 3 */
float fraction = 0.10, plane = 25.;
const double translation[3] = {1.0, 0.0, 0.0}; /* Translation vector */
join_num = cs_join_perio_add_translation("98 or 99",
fraction,
plane,
verbosity,
visualization,
translation);
/*! [mesh_periodicity_1] */
END_EXAMPLE_SCOPE
/* Example 2: define a periodicity of rotation */
/* ------------------------------------------- */
BEGIN_EXAMPLE_SCOPE
/*! [mesh_periodicity_2] */
int join_num;
int verbosity = 1; /* per-task dump if > 1, debug level if >= 3 */
int visualization = 1; /* debug level if >= 3 */
float fraction = 0.10, plane = 25.;
double theta = 20; /* angle in degrees */
double axis[3] = {1.0, 0, 0}; /* axis of rotation */
double invariant[3] = {0, 0, 0}; /* invariant point */
/* change default values */
fraction = 0.2;
verbosity = 2;
join_num = cs_join_perio_add_rotation("3",
fraction,
plane,
verbosity,
visualization,
theta,
axis,
invariant);
/*! [mesh_periodicity_2] */
END_EXAMPLE_SCOPE
BEGIN_EXAMPLE_SCOPE
/* Example 3: define a general periodicity */
/* --------------------------------------- */
/*! [mesh_periodicity_3] */
/* We define a general transformation using a homogeneous matrix:
*
* We define the first 3 rows of a 4x4 matrix:
* _ _
* | r11 r12 r13 tx | t(x,y,z) : translation vector
* | r21 r22 r23 ty | r(i,j) : rotation matrix
* | r31 r32 r33 tz |
* |_ 0 0 0 1 _|
*
* Transformations may be combined using matrix multiplication,
* so this be used for helecoidal transformations for instance. */
int join_num;
int verbosity = 1; /* per-task dump if > 1, debug level if >= 3 */
int visualization = 1; /* debug level if >= 3 */
float fraction = 0.10, plane = 25.;
double matrix[3][4] = {{1., 0., 0., 0.5},
{0., 1., 0., 0.},
{0., 0., 1., 0.}};
join_num = cs_join_perio_add_mixed("all[]",
fraction,
plane,
verbosity,
visualization,
matrix);
/*! [mesh_periodicity_3] */
/*--------------------------------------------------------------------------*/
/* Example with advanced parameters;
Advanced parameters may be modified to solve errors during the
joining step or to get a better mesh quality. */
/*! [mesh_periodicity_4] */
/* Merge tolerance factor:
* used to locally modify the tolerance associated to each
* vertex BEFORE the merge step.
* = 0 => no vertex merge;
* < 1 => vertex merge is more strict. It may increase the number
* of tolerance reduction and so define smaller subset of
* vertices to merge together but it can drive to loose
* intersections;
* = 1 => no change;
* > 1 => vertex merge is less strict. The subset of vertices able
* to be merged together is greater. */
double mtf = 1.00;
/* Pre-merge factor:
* this parameter is used to define a bound under which two vertices
* are merged before the merge step.
* Tolerance limit for the pre-merge = pmf * fraction. */
double pmf = 0.10;
/* Tolerance computation mode:
*
* 1: (default) tol = min. edge length related to a vertex * fraction
* 2: tolerance is computed like in mode 1 with in addition, the
* multiplication by a coefficient equal to the max sin(e1, e2)
* where e1 and e2 are two edges sharing the same vertex V for which
* we want to compute the tolerance.
* 11: as 1 but taking into account only the selected faces
* 12: as 2 but taking into account only the selected faces */
int tcm = 1;
/* Intersection computation mode:
* 1: (default) Original algorithm.
* Try to snap intersection to extremity.
* 2: New intersection algorithm.
* Avoid snapping intersection to extremity. */
int icm = 1;
/* Maximum number of equivalence breaks which is
* enabled during the merge step. */
int max_break = 500;
/* Maximum number of sub-faces when splitting a selected face. */
int max_sub_face = 100;
/* tml, tmb and tmr are parameters of the searching algorithm for
* face intersections between selected faces (octree structure).
* Useful to adjust speed vs. memory consumption. */
/* Tree Max Level:
* deepest level reachable when building the tree */
int tml = 30;
/* Tree Max Boxes:
* max. number of bounding boxes which can be linked to a leaf of the tree
* (not necessary true for the deepest level) */
int tmb = 25;
/* Tree Max. Ratio:
* stop refining the tree structure when
* number of bounding boxes > tmr * number of faces to locate.
* In parallel, a separate (usually lower) value may be set for
* the initial coarse tree used to determine distribution.
* Reducing this will help reduce memory consumption. */
double tmr = 5.0;
double tmr_distrib = 2.0;
/* Set advanced parameters */
cs_join_set_advanced_param(join_num,
mtf, pmf, tcm, icm,
max_break, max_sub_face,
tml, tmb, tmr, tmr_distrib);
/*! [mesh_periodicity_4] */
END_EXAMPLE_SCOPE
}
/*----------------------------------------------------------------------------*/
END_C_DECLS
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