/usr/share/code_saturne/user/cs_user_lagr_model.c is in code-saturne-data 4.3.3+repack-1build1.
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/*
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 <stdio.h>
/*----------------------------------------------------------------------------
* Local headers
*----------------------------------------------------------------------------*/
#include "cs_lagr.h"
#include "cs_lagr_post.h"
#include "cs_lagr_stat.h"
#include "cs_lagr_particle.h"
#include "cs_lagr_prototypes.h"
#include "cs_prototypes.h"
/*---------------------------------------------------------------------------------*/
/* \brief User subroutine of the Lagrangian particle-tracking module
*
* User subroutine for input of calculation parameters.
* This parameters concerns physical, numerical and post-processing options.
*/
/*---------------------------------------------------------------------------------*/
void
cs_user_lagr_model(void)
{
return;
/* ==========================================================================
* 1. Particle-tracking mode
* ========================================================================== */
/* iilagr = 0 : no particle tracking (default)
* = 1 : particle-tracking one-way coupling
* = 2 : particle-tracking two-way coupling
* = 3 : particle tracking on frozen field
* (this option requires a calculation restart isuite=1,
* all Eulerian fields are frozen (pressure, velocities,
* scalars). This option is stronger than iccvfg) */
cs_glob_lagr_time_scheme->iilagr = 1;
/* ==========================================================================
* 2. Particle-tracking calculation restart
* ========================================================================== */
/* isuila = 0 : no restart (default)
= 1 : restart (this value requires a restart on the continuous
phase too, i.e. isuite = 1) */
cs_glob_lagr_time_scheme->isuila = 0;
/* Restart on volume and boundary statistics, and two-way coupling terms; */
/* useful if isuila = 1 (defaul off: 0 ; on: 1) */
if (cs_glob_lagr_time_scheme->isuila == 1)
cs_glob_lagr_stat_options->isuist = 0;
/* ==========================================================================
* 3. Particle tracking: specific models
* ========================================================================== */
/* iphyla = 0 : only transport modeling (default)
* = 1 : equation on temperature (in Celsius degrees), diameter or mass
* = 2 : pulverized coal combustion (only available if the continuous
* phase is a flame of pulverized coal) */
cs_glob_lagr_model->physical_model = 0;
/* 3.1 equation on temperature, diameter or mass */
if (cs_glob_lagr_model->physical_model == 1) {
/* equation on diameter */
/* (default off: 0 ; on: 1) */
cs_glob_lagr_specific_physics->idpvar = 0;
/* equation on temperature (in Celsius degrees) */
/* (default off: 0 ; on: 1) */
/* This option requires a thermal scalar for the continuous phase. */
cs_glob_lagr_specific_physics->itpvar = 0;
/* equation on mass */
/* (default off: 0 ; on: 1) */
cs_glob_lagr_specific_physics->impvar = 0;
}
/* 3.2 coal fouling
* ---------------------------------------------------------------------
* Reference internal reports EDF/R&D: HI-81/00/030/A and HI-81/01/033/A
*
* Evaluation of the probability for a particle to stick to a wall.
* This probability is the ratio of a critical viscosity on the
* viscosity of coal ashes
*
* visref
* P(Tp) = -------- for viscen >= visref
* viscen
*
* = 1 otherwise
*
*
* The expression of J.D. Watt and T.Fereday (J.Inst.Fuel-Vol42-p99)
* is used to evaluate the viscosity of the ashes
*
* Enc1 * 1.0d+7
* Log (10*viscen) = --------------- + Enc2
* 10 2
* (Tp(C) - 150)
*
* In literature, the range of the critical viscosity visref is between
* 8 Pa.s and 1.D7 Pa.s For general purpose 1.0D+4 Pa.s is chosen
*----------------------------------------------------------------------- */
if (cs_glob_lagr_model->physical_model == 2) {
/* iencra = 0 no fouling (default)
= 1 fouling
* In uslag2.f90, the boundary on which the fouling can occur must
be given
* Post-processing: iensi3 = 1 and
* iencnbbd = 1 / iencmabd = 1 / iencdibd = 1 /iencckbd = 1 (10.2) */
cs_glob_lagr_model->fouling = 0;
/* Example of definition of fouling criteria for each coal first
(and single) coal icha = 1 */
int icha = 0;
/* tprenc : threshold temperature below which no fouling occurs
(in degrees Celcius) */
cs_glob_lagr_encrustation->tprenc[icha] = 600.0;
/* visref : critical viscosity (Pa.s) */
cs_glob_lagr_encrustation->visref[icha] = 10000.0;
/* > coal composition in mineral matters:
(with SiO2 + Al2O3 + Fe2O3 + CaO + MgO = 100% in mass) */
cs_real_t sio2 = 36.0;
cs_real_t al2o3 = 20.8;
cs_real_t fe2o3 = 4.9;
cs_real_t cao = 13.3;
/* Enc1 and Enc2 : coefficients in Watt and Fereday expression */
cs_glob_lagr_encrustation->enc1[icha] = 0.00835 * sio2 + 0.00601 * al2o3 - 0.109;
cs_glob_lagr_encrustation->enc2[icha] = 0.0415 * sio2 + 0.0192 * al2o3
+ 0.0276 * fe2o3 + 0.016 * cao - 3.92;
}
/* ==========================================================================
* 4. Calculation features for the dispersed phases
* ========================================================================== */
/* 4.1 Additional variables
* ------------------------
*
* Additional variables may be accessed using the (CS_LAGR_USER + i)
* attribute, where 0 < i < lagr_params->n_user_variables
* is the additional variable index.
*
* The integration of the associated differential stochastic equation
* requires a user intervention in cs_user_lagr_sde() function */
cs_lagr_set_n_user_variables(0);
/* 4.2 Steady or unsteady continuous phase
* ------------------------
* if steady: isttio = 1
* if unsteady: isttio = 0
* if iilagr = 3 then isttio = 1
Remark: if isttio = 0, then the statistical averages are reset
at each time step */
if (cs_glob_lagr_time_scheme->iilagr != 3)
cs_glob_lagr_time_scheme->isttio = 0;
/* 4.3 Two-way coupling: (iilagr = 2) */
if (cs_glob_lagr_time_scheme->iilagr == 2) {
/* * number of absolute time step (i.e. with restart)
from which a time average for two-way coupling source terms is
computed (steady source terms)
* if the time step is lower than NSTITS, source terms are
unsteady: they are reset at each time step
* useful only if ISTTIO = 1.
* the min value for NSTITS is 1 */
cs_glob_lagr_source_terms->nstits = 1;
/* two-way coupling for dynamic (velocities and turbulent scalars) */
/* (default off: 0 ; on: 1) */
/* (useful if ICCVFG = 0) */
cs_glob_lagr_source_terms->ltsdyn = 0;
/* two-way coupling for mass (if IPHYLA = 1 and IMPVAR = 1) */
/* (default off: 0 ; on: 1) */
if ( cs_glob_lagr_model->physical_model == 1
&& ( cs_glob_lagr_specific_physics->impvar == 1
|| cs_glob_lagr_specific_physics->idpvar == 1))
cs_glob_lagr_source_terms->ltsmas = 0;
/* two-way coupling for thermal scalar */
/* (if iphyla = 1 and impvar = 1, or iphyla = 2) */
/* or for coal variables (if IPHYLA = 2) */
/* (default off: 0 ; on: 1) */
if ( ( cs_glob_lagr_model->physical_model == 1
&& cs_glob_lagr_specific_physics->itpvar == 1)
|| cs_glob_lagr_model->physical_model == 2)
cs_glob_lagr_source_terms->ltsthe = 0;
}
/* 4.4 Volume statistics
--------------------- */
/* Threshold for the management of volume statistics
-------------------------------------------------
* the value of the seuil variable is a statistical weight.
* each cell of the mesh contains a statistical weight
(sum of the statistical weights of all the particles
located in the cell); seuil is the minimal value from
which the contribution in statistical weight of a particle
is not taken into account anymore in the full model
of turbulent dispersion, in the resolution of the
Poisson equation of correction of the mean velocities, and
in the writing of the listing and post-processing. */
cs_glob_lagr_stat_options->threshold = 0.0;
/* Calculation of the volume statistics from the absolute number
* of time steps
* * idstnt is a absolute number of time steps
* (i.e. including calculation restarts) */
cs_glob_lagr_stat_options->idstnt = 1;
/* Steady calculation from the absolute time step nstist
* * nstist is a absolute number of time steps
* (i.e. including calculation restarts) from which the statistics
* are averaged in time.
* * useful if the calculation is steady (isttio=1)
* * if the number of time steps is lower than nstits,
* the transmitted source terms are unsteady (i.e. they are reset to
* zero ar each time step)
* * the minimal value acceptable for nstist is 1. */
cs_glob_lagr_stat_options->nstist = cs_glob_lagr_stat_options->idstnt;
/* 4.4.2 Volume statistical variables */
/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
/* Activation of the calculation of the particle volume fraction */
/* Name of the mean : Part_vol_frac */
cs_lagr_stat_activate(CS_LAGR_STAT_VOLUME_FRACTION);
/* Activation of the calculation of the particle velocity */
cs_lagr_stat_activate_attr(CS_LAGR_VELOCITY);
/* Activation of the calculation of the particle residence time */
cs_lagr_stat_activate_attr(CS_LAGR_RESIDENCE_TIME);
/* Activation of the calculation of the weight */
cs_lagr_stat_activate_attr(CS_LAGR_STAT_WEIGHT);
/* 2) Specific models (iphyla = 1) following the chosen options: */
/* Mean and variance of the temperature */
/* Mean and variance of the diameter */
/* Mean and variance of the mass */
/* 6) Statistics per group:
* ----------------------- */
cs_glob_lagr_model->n_stat_classes = 0;
/* ==========================================================================
* 8. Options concerning the numerical treatment of the dispersed phase
* ========================================================================== */
/* Integration order of the stochastic differential equations */
/* (default 2; acceptable values 1 or 2) */
cs_glob_lagr_time_scheme->t_order = 1;
/* ==========================================================================
* 9. Options concerning the treatment of the dispersed phase
* ========================================================================== */
/* Caution: In this version, the turbulent dispersion works only if
------- the continuous phase is calculated with a k-eps or a Rij-eps model
Activation of the turbulent dispersion
(default on: 1 ; off: 0) */
cs_glob_lagr_time_scheme->idistu = 1;
/* Turbulent dispersion imposed to the fluid one.
If activated, then particle turbulent dispersion is
equal to the fluid-particle one. The crossing-trajectory effects
are suppressed ; it is then a case of turbulent diffusion. If the
simulated particle density is equal to the fluid density, then
we are simulating the displacement of fluid particles.
(default off: 0 ; on: 1) */
cs_glob_lagr_time_scheme->idiffl = 0;
/* modcpl :
= 0 for the incomplete model (default value)
> 0 for the full model, is equal the absolute number
of time steps from which the full model is activated
modcpl must not be lower than idstnt */
cs_glob_lagr_time_scheme->modcpl = 0;
/* idirla (=1 or 2 or 3) : 1st, 2nd or 3rd direction
of the full model. Corresponds to the main direction
of the flow. Allow to calculate a non-isotropic Lagrangian timescale
(default idirla=1) */
if (cs_glob_lagr_time_scheme->modcpl > 0)
cs_glob_lagr_time_scheme->idirla = 1;
/* ==========================================================================
* 10. Options concerning the treatment of specific forces
* ========================================================================== */
/* idlvo = 0
= 1 dlvo deposition conditions are activated for the
wall with appropriate conditions idepfa (see cs_user_lag2.c) */
cs_glob_lagr_model->dlvo = 0;
if (cs_glob_lagr_model->dlvo == 1) {
/* Constants for the van der Waals forces
--------------------------------------
Hamaker constant for the particle/fluid/substrate system:*/
cs_glob_lagr_physico_chemical->cstham = 6e-20;
/* Retardation wavelength for the particle/fluid/substrate system:*/
cs_glob_lagr_physico_chemical->lambda_vdw = 1000.0;
/* Constants for the elecstrostatic forces
---------------------------------------
Dielectric constant of the fluid (example: water at 293 K)*/
cs_glob_lagr_physico_chemical->epseau = 80.1;
/* Electrokinetic potential of the first solid - particle (Volt)*/
cs_glob_lagr_physico_chemical->phi_p = 0.05;
/* Electrokinetic potential of the second solid - surface (Volt)*/
cs_glob_lagr_physico_chemical->phi_s = -0.05;
/* Valency of ions in the solution (used for EDL forces)*/
cs_glob_lagr_physico_chemical->valen = 1.0;
/* Ionic force (mol/l)*/
cs_glob_lagr_physico_chemical->fion = 0.01;
}
/* ==========================================================================
* 11. Activation of Brownian motion
* ========================================================================== */
/* Activation of Brownian motion:
(default off: 0 ; on: 1)
Caution: OPTION FOR DEVELOPERS ONLY
======== */
cs_glob_lagr_brownian->lamvbr = 0;
/* ==========================================================================
* 12. Activation of deposition model
* ========================================================================== */
/* Activation of the deposition model
(default off: 0 ; on: 1) */
cs_glob_lagr_model->deposition = 0;
/* ==========================================================================
* 13. Activation of roughness and resuspension model
* ========================================================================== */
/* Activation of the resuspension model
(default off: 0 ; on: 1) */
cs_glob_lagr_model->resuspension = 0;
/* Caution: OPTION FOR DEVELOPERS ONLY
========
dlvo deposition conditions for roughness surface */
cs_glob_lagr_model->roughness = 0;
/* Parameters of the particle resuspension model for the roughness */
/* average distance between two large-scale asperities */
cs_glob_lagr_reentrained_model->espasg = 2e-05;
/* density of the small-scale asperities */
cs_glob_lagr_reentrained_model->denasp = 63600000000000.0;
/* radius of small asperities */
cs_glob_lagr_reentrained_model->rayasp = 5e-09;
/* radius of large asperities */
cs_glob_lagr_reentrained_model->rayasg = 2e-06;
/* Young's modulus (GPa) */
cs_glob_lagr_reentrained_model->modyeq = 266000000000.0;
/* ==========================================================================
* 14. Activation of the clogging model
* ========================================================================== */
/* Activation of the clogging model
(default off: 0 ; on: 1)
Caution: OPTION FOR DEVELOPERS ONLY
======== */
cs_glob_lagr_model->clogging = 0;
/* Parameters for the particle clogging model */
/* Jamming limit */
cs_glob_lagr_clogging_model->jamlim = 0.74;
/* Minimal porosity */
cs_glob_lagr_clogging_model->mporos = 0.366;
/* Hamaker constant for the particle/fluid/particle system */
cs_glob_lagr_clogging_model->csthpp = 5e-20;
/* ==========================================================================
* 14bis. Influence of the deposit on the flow
* ========================================================================== */
/* Activation of the influence of the deposit on the flow
by the head losses calculation (with clogging model only)
(default off: 0 ; on: 1) */
cs_glob_lagr_reentrained_model->iflow = 0;
if (cs_glob_lagr_reentrained_model->iflow == 1) {
/* One-way coupling */
cs_glob_lagr_time_scheme->iilagr = 1;
/* The statistical averages are not reset
at each time step */
cs_glob_lagr_time_scheme->isttio = 1;
}
/*==========================================================================
* 15. Activation of the precipitation/disolution model
*==========================================================================*/
/* Activation of the precipitation/dissolution model
(default off: 0 ; on: 1)
Caution: OPTION FOR DEVELOPERS ONLY */
cs_glob_lagr_model->precipitation = 0;
/* Diameter of particles formed by precipitation */
cs_glob_lagr_precipitation_model->diameter = 2e-06;
/* Diameter of particles formed by precipitation */
cs_glob_lagr_precipitation_model->rho = 5200.0;
/* Number of particle classes */
cs_glob_lagr_precipitation_model->nbrclas = 2;
/* ==========================================================================
* 16. Variables to visualize on the trajectories or the particles
* See also cs_user_postprocess_mesh in cs_user_postprocess.c to define
* the associated visualization particle or trajectory segment meshes.
* ========================================================================== */
/* For all the following variables, a value of 0 means "off", and 1 means "on"*/
cs_lagr_post_options_t *lagr_post_options = cs_lagr_post_get_options();
/* velocity of the flow seen */
lagr_post_options->ivisv1 = 0;
/* particle velocity */
lagr_post_options->ivisv2 = 0;
/* residence time */
lagr_post_options->ivistp = 0;
/* diameter */
lagr_post_options->ivisdm = 0;
/* temperature */
if ( cs_glob_lagr_model->physical_model == 1
&& cs_glob_lagr_specific_physics->itpvar == 1)
lagr_post_options->iviste = 0;
/* mass */
lagr_post_options->ivismp = 0;
if (cs_glob_lagr_model->physical_model == 2) {
/* coal: diameter of the shrinking core */
lagr_post_options->ivisdk = 0;
/* coal: mass of water */
lagr_post_options->iviswat = 0;
/* coal: mass of reactive coal */
lagr_post_options->ivisch = 0;
/* coal: mass of coke */
lagr_post_options->ivisck = 0;
}
/* 16.1 Boundary statistics: visualization of the particle/boundaries
interactions
------------------------------------------------ */
/* 16.1.1 Generic parameters
~~~~~~~~~~~~~~~~~~~~~~~~~~
Particle/boundary interaction mode
(default off: 0 ; on: 1) */
lagr_post_options->iensi3 = 0;
/* 16.1.2 Information to be recorded
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* To activate them, the user has to set below
the corresponding keyword to 1.
* The default selection must be validated or modified by the user.
* By default the asked information for all the particle/wall interactions
are written in the same recording.
* The boundary statistic 'number of particle/boundary interactions' must be
selected to activate the particle average imoybr(...) = 2 */
/* Number of particle/boundary interactions
(default off: 0 ; on: 1) */
cs_glob_lagr_boundary_interactions->inbrbd = 1;
/* Particle mass flux associated to particle/boundary interactions
(default off: 0 ; on: 1)*/
cs_glob_lagr_boundary_interactions->iflmbd = 1;
/* Angle between particle velocity and the plan of the boundary face
(default off: 0 ; on: 1) */
cs_glob_lagr_boundary_interactions->iangbd = 0;
/* Norm of particle velocity during the interation with the boundary face
(default off: 0 ; on: 1) */
cs_glob_lagr_boundary_interactions->ivitbd = 0;
/* (default off: 0 ; on: 1) */
if ( cs_glob_lagr_model->physical_model == 2
&& cs_glob_lagr_model->fouling == 1) {
/* Number of particle/boundary interactions with fouling */
cs_glob_lagr_boundary_interactions->iencnbbd = 0;
/* Mass of fouled coal particles */
cs_glob_lagr_boundary_interactions->iencmabd = 0;
/* Diameter of fouled coal particles */
cs_glob_lagr_boundary_interactions->iencdibd = 0;
/* Coke fraction of fouled coal particles */
cs_glob_lagr_boundary_interactions->iencckbd = 0;
}
/* Additional user information to be recorded
------------------------------------------
(for instance, erosion rate, temperature..)
* these additional recordings are stored in the bound_stat array
* here we prescribe the nusbor number of additional recordings
* the max value of this number is nusbrd=10 */
cs_glob_lagr_boundary_interactions->nusbor = 0;
/* 16.1.3 Name of the recordings for display,
Average in time of particle average
of the boundary statistics
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
* A priori the user intervenes only in the additional user information
to be recorded: he must prescribe the name of the recording as well as
the type of average that he wishes to apply to it for the writing
of the listing and the post-processing.
* The applied average is prescribed through the imoybr array:
- if imoybr(iusb(ii)) = 0 -> no average applied
- if imoybr(iusb(ii)) = 1 -> a time average is applied, i.e. the
statistic is divided by the last time step in the case of an unsteady
calculation with a number of iterations lower than nstist; or that
the statistic is divided by the recording time in the case of a
steady calculation.
- if imoybr(iusb(ii)) = 2 -> a particle average is applied, i.e. the
statistic is divided by the number of recorded particle/boundary
interactions (in terms of statistical weight) in bound_stat(nfabor,inbr)
To use this average, inbrbd must be set to 1.
- if imoybr(iusb(ii)) = 3 -> (coal fouling only) a particle average
is applied, i.e. the statistic is divided by the number of recorded
particle/boundary interactions with fouling (in terms of statistical
weight) in bound_stat(nfabor,inbr), To use this average, iencnbbd must be
set to 1.
* The back-ups in the restart file are performed without applying
this average. */
/*==========================================================================
* Periodicity for the output of the Lagrangian log (listla)
* ==========================================================================*/
cs_glob_lagr_log_frequency_n = 1;
}
/*----------------------------------------------------------------------------*/
END_C_DECLS
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