bin_particles_in_cells
 

Hi everybody,

is there anyone who knows that what the macro (bin_particles_in_cells) exactly does?

Thank you so much,

hi
From 3 years ago u are still stuck in that ?!

Wow, you're not wrong, he's asked the same question on 11th of November 2011.

It appears this macro loops over all the particles in a domain on a cell-by-cell basis according to this page.

If this macro has been removed (or altered) between versions of Fluent, you may require some code adjustments. What are you trying to achieve overall?

hi 'e'
i wrote my code and i used

bin_particles_in_cells(d); /* particles are bined in each cell of the fluid domain */

but this works ok in fluent 6.3.26 but in v15.0 no, in v15.0 it changed , in cl_dpm.h it wrote :

FLUENT_EXPORT void bin_particles_in_cells(Domain *domain, cxboolean init_cells);

there is another argument and i dont know what to write there .

i am working with dpm and i want to add source terms to k and epsilon.

any idea ?
thanks for your reply

:D:D:D:D i found him in another thread in 2011 as you mentioned :D;)

[QUOTE=HyperNova;541073]hi
From 3 years ago u are still stuck in that ?!

4 years ago I needed this macro for a project. but I solved the problem with another method.
last year for another project I needed it again. but no one could answer my question. but I solved the problem on my own.

it seems that you feel high self confidence and make fun on the others. I am waiting to see how long it takes you to solve the problem.

good luck:D:D:D:D:D:D:D:D:D:D

If you want to add source terms to k and e of the turbulence model of the continuous phase then use the DEFINE_SOURCE macro.

As for looping through all particles, try this code (source):

masoud come on , i need it quick
i used

bin_particles_in_cells(d); /* particles are bined in each cell of the fluid domain */

but it just works in fluent 6.3.26 , in v15.0 it doeant work and it says it needs another argument! id cl_dpm it wrote

FLUENT_EXPORT void bin_particles_in_cells(Domain *domain, cxboolean init_cells);

i dont know what is cxboolean init_cells and what should i put there , masoud please help!

this is my UDF

DEFINE_SOURCE(k_new_model_all_terms,c,t,dS,eqn) /* source term for the k equation */

{

Domain *d=Get_Domain(1); /* domain used in the particle loop. this should be the fluid domain , change index if necessary*/

Particle *p; /* particle index to be used in particle loop */

double umean[3], vmean[3], mass_mean, diamp, V_relative; /* declaration of variables */

double Skp, Sep, Rep, aaa, Mu, rho, TKEDR, TKE, v_mean[3];

int i; /* index used in for loops */

real g = 9.81; /* gravity constant */

real ce3 = 1.0; /* proportionality constant */

real x[ND_ND]; /* this will hold the position vector */

real depth = 0.42;
real injection_height = 0.01;
real Temp = 25.0;
real Pressure_REF = 101325.0;
real MolarWeight = 28.97; /* air */
real ST = 0.072;

real Ck1 = 6.0;
real Ck2 = 0.75;
real Ce1 = 4.0;
real Ce2 = 0.6;

real gas_density, P, Eo, Cd, Cd_sphere, Re, Cf, dpm_frac;
real a11, a22, a33, a12, a13, a21, a23, a31, a32, sen, Production_K;

Alloc_Storage_Vars(d, SV_DPM_PARTICLE_BIN, SV_NULL); /* memory is allocated for the particles which are to be bined in each cell */

bin_particles_in_cells(d); /* particles are bined in each cell of the fluid domain */

begin_particle_cell_loop(p, c, t) /* loops over all particle p which are contained in each cell c */

{

}

i put my code here , upper of this message, would you mind taking a look of that, that sentence in red color id making problem, i don't know why particles deleted from domain automaticly ,
with bin_particles_in_cells(d); Fluent says another argument is needed, in another thread (http://www.cfd-online.com/Forums/flu...s-command.html) LICH tried to put 0 1 true false as another argument but i did not work for him and me either, if you have any idea i will be thankful if you share it ,

UDF for looping on all particles in each cell.
 

Since Fluent 12, the implementation of bin_particles_in_cells(domain, count) has changed and you need additional macro (unthread_particles_to_all_inj(domain, check)). Please be aware that this additional macro had only one argument at least until Fluent version 14. Since Fluent 17 it needs 2 arguments (domain and check (which is a boolean variable)).

Here is a simple UDF for looping on all particles in each cell.

DEFINE_ADJUST(Looping, domain)
{
cxboolean count;
cxboolean check;
Thread *t;
cell_t c;
Particle *p;

Alloc_Storage_Vars(domain, SV_DPM_PARTICLE_BIN, SV_NULL);

bin_particles_in_cells(domain, count);
thread_loop_c (t,domain)
{
begin_c_loop(c, t)

{

begin_particle_cell_loop(p,c,t)
{
/* you can do your calculation on particles in one cell here*/
}
end_particle_cell_loop(p, c, t)
}
end_c_loop(c, t)
unthread_particles_to_all_inj(domain, check);
Free_Storage_Vars(domain, SV_DPM_PARTICLE_BIN, SV_NULL); /* release allocated memory*/
}
}