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/* Gerris - The GNU Flow Solver
* Copyright (C) 2001-2008 National Institute of Water and Atmospheric Research
*
* 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., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <stdlib.h>
#include <math.h>
#include "event.h"
#include "solid.h"
#include "config.h"
#define CW260_F77 F77_FUNC (cw260, CW260)
#define KMTS_F77 F77_FUNC (kmts, KMTS)
void CW260_F77 (const float * zd,
const float * zt,
const float * zh,
const float * zu,
const int * nverb,
int * nfun,
float * zel);
void KMTS_F77 (const int * nfun,
const float * xx,
const float * yy,
const float * tt,
float * uu,
float * vv,
float * ut,
float * vt,
float * du,
float * dv,
float * etah);
/* GfsInitStokesWave: Header */
typedef struct _GfsInitStokesWave GfsInitStokesWave;
struct _GfsInitStokesWave {
/*< private >*/
GfsGenericInit parent;
/*< public >*/
gdouble steepness, depth;
};
#define GFS_INIT_STOKES_WAVE(obj) GTS_OBJECT_CAST (obj,\
GfsInitStokesWave,\
gfs_init_stokes_wave_class ())
GfsGenericInitClass * gfs_init_stokes_wave_class (void);
/* GfsInitStokesWave: Object */
#define WAVELENGTH 100. /* metres */
static int order = 0;
static void gfs_init_stokes_wave_read (GtsObject ** o, GtsFile * fp)
{
if (GTS_OBJECT_CLASS (gfs_init_stokes_wave_class ())->parent_class->read)
(* GTS_OBJECT_CLASS (gfs_init_stokes_wave_class ())->parent_class->read)
(o, fp);
if (fp->type == GTS_ERROR)
return;
GfsInitStokesWave * w = GFS_INIT_STOKES_WAVE (*o);
GtsFileVariable var[] = {
{GTS_DOUBLE, "depth", TRUE},
{GTS_DOUBLE, "steepness", TRUE},
{GTS_NONE}
};
var[0].data = &w->depth;
var[1].data = &w->steepness;
gts_file_assign_variables (fp, var);
if (fp->type == GTS_ERROR)
return;
float zd = WAVELENGTH*w->depth, zh = w->steepness*WAVELENGTH/M_PI, zu = 0., l;
int nverb = 0;
float min = 1., max = 100., zt = (min + max)/2.;
do {
CW260_F77 (&zd, &zt, &zh, &zu, &nverb, &order, &l);
fprintf (stderr, "# order: %d wavelength: %g period: %g\n",
order, l, zt);
if (l > WAVELENGTH)
max = zt;
if (l < WAVELENGTH)
min = zt;
zt = (min + max)/2.;
} while (fabs (l - WAVELENGTH) > 1e-4);
}
static void gfs_init_stokes_wave_write (GtsObject * o, FILE * fp)
{
if (GTS_OBJECT_CLASS (gfs_init_stokes_wave_class ())->parent_class->write)
(* GTS_OBJECT_CLASS (gfs_init_stokes_wave_class ())->parent_class->write)
(o, fp);
fprintf (fp, " { depth = %g steepness = %g }\n",
GFS_INIT_STOKES_WAVE (o)->depth,
GFS_INIT_STOKES_WAVE (o)->steepness);
}
static void init_velocity (FttCell * cell, GfsVariable ** velocity)
{
FttVector p;
gfs_cell_cm (cell, &p);
float x = (p.x + 0.5)*WAVELENGTH, y = p.y*WAVELENGTH, t = 0., u, v, ut, vt, du, dv, etah;
KMTS_F77 (&order, &x, &y, &t, &u, &v, &ut, &vt, &du, &dv, &etah);
GFS_VALUE (cell, velocity[0]) = u/sqrt(WAVELENGTH*9.81);
GFS_VALUE (cell, velocity[1]) = v/sqrt(WAVELENGTH*9.81);
}
static gdouble stokes_height (gdouble x, gdouble y, gdouble z, gdouble t)
{
float xx = (x + 0.5)*WAVELENGTH, yy = WAVELENGTH, u, v, ut, vt, du, dv, etah, t1 = 0.;
KMTS_F77 (&order, &xx, &yy, &t1, &u, &v, &ut, &vt, &du, &dv, &etah);
return etah/WAVELENGTH - y;
}
static gboolean gfs_init_stokes_wave_event (GfsEvent * event, GfsSimulation * sim)
{
if ((* GFS_EVENT_CLASS (GTS_OBJECT_CLASS (gfs_init_stokes_wave_class ())->parent_class)->event)
(event, sim)) {
GfsVariable ** velocity = gfs_domain_velocity (GFS_DOMAIN (sim));
GfsVariable * t = gfs_variable_from_name (GFS_DOMAIN (sim)->variables, "T");
g_assert (velocity);
g_assert (t);
gfs_domain_cell_traverse (GFS_DOMAIN (sim), FTT_PRE_ORDER, FTT_TRAVERSE_LEAFS, -1,
(FttCellTraverseFunc) init_velocity, velocity);
GfsSurface * surface = GFS_SURFACE (gts_object_new (GTS_OBJECT_CLASS (gfs_surface_class ())));
surface->f = gfs_function_spatial_new (gfs_function_spatial_class (), stokes_height);
gfs_object_simulation_set (surface->f, sim);
gfs_domain_init_fraction (GFS_DOMAIN (sim), GFS_GENERIC_SURFACE (surface), t);
gts_object_destroy (GTS_OBJECT (surface));
return TRUE;
}
return FALSE;
}
static void gfs_init_stokes_wave_class_init (GfsGenericInitClass * klass)
{
GFS_EVENT_CLASS (klass)->event = gfs_init_stokes_wave_event;
GTS_OBJECT_CLASS (klass)->read = gfs_init_stokes_wave_read;
GTS_OBJECT_CLASS (klass)->write = gfs_init_stokes_wave_write;
}
static void gfs_init_stokes_wave (GfsInitStokesWave * w)
{
w->depth = 0.5;
w->steepness = 0.3;
}
GfsGenericInitClass * gfs_init_stokes_wave_class (void)
{
static GfsGenericInitClass * klass = NULL;
if (klass == NULL) {
GtsObjectClassInfo gfs_init_stokes_wave_info = {
"GfsInitStokesWave",
sizeof (GfsInitStokesWave),
sizeof (GfsGenericInitClass),
(GtsObjectClassInitFunc) gfs_init_stokes_wave_class_init,
(GtsObjectInitFunc) gfs_init_stokes_wave,
(GtsArgSetFunc) NULL,
(GtsArgGetFunc) NULL
};
klass = gts_object_class_new (GTS_OBJECT_CLASS (gfs_generic_init_class ()),
&gfs_init_stokes_wave_info);
}
return klass;
}
const gchar gfs_module_name[] = "stokes";
const gchar * g_module_check_init (void);
const gchar * g_module_check_init (void)
{
gfs_init_stokes_wave_class ();
return NULL;
}
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