{"id":382170,"date":"2024-09-10T12:59:10","date_gmt":"2024-09-10T12:59:10","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/382170\/"},"modified":"2024-09-10T12:59:10","modified_gmt":"2024-09-10T12:59:10","slug":"382170","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/382170\/","title":{"rendered":"Reply To: Rotating and mass flow inlet"},"content":{"rendered":"

<p>I tried to write a function to determine the wall cells of the inner cylinder (id=5) for pumping air into them, but so far Fluent refuses to understand this mass flow…<br><br><\/p><div>#include “udf.h”<\/div><div> <\/div><div> <\/div><div>DEFINE_EXECUTE_AT_END(find_first_near_wall_cells)<\/div><div>{<\/div><div>    Domain *domain;<\/div><div>    Thread *wall_thread;<\/div><div>    face_t f;<\/div><div>    cell_t c;<\/div><div>    Thread *adjacent_thread;<\/div><div>    real cell_dist;<\/div><div> <\/div><div>    domain = Get_Domain(1);<\/div><div>    <\/div><div> <\/div><div>    wall_thread = Lookup_Thread(domain, 5); <\/div><div> <\/div><div> <\/div><div>    begin_f_loop(f, wall_thread)<\/div><div>    {<\/div><div>       <\/div><div>        c = F_C0(f, wall_thread);<\/div><div> <\/div><div>       <\/div><div>        adjacent_thread = THREAD_T0(wall_thread);<\/div><div>        cell_dist = C_WALL_DIST(c, adjacent_thread);<\/div><div> <\/div><div> <\/div><div>        if (cell_dist < 0.001)<\/div><div>        {<\/div><div>            Message(“Found adjacent cell to wall at face: %d\\n”, c);<\/div><div>        }<\/div><div>    }<\/div><div>    end_f_loop(f, wall_thread)<\/div><div>}<\/div><div> <\/div><div>DEFINE_ADJUST(adjust_mass_source, domain)<\/div><div>{<\/div><div>    Thread *t;<\/div><div>    cell_t c;<\/div><div>    real mass_flow = 2;  <\/div><div>    real cell_dist;<\/div><div> <\/div><div> <\/div><div>    thread_loop_c(t, domain)<\/div><div>    {<\/div><div>        begin_c_loop(c, t)<\/div><div>        {<\/div><div> <\/div><div>            cell_dist = C_WALL_DIST(c, t);<\/div><div> <\/div><div> <\/div><div>            if (cell_dist < 0.001)  <\/div><div>            {<\/div><div> <\/div><div>                C_UDMI(c, t, 0) = mass_flow;  <\/div><div>            }<\/div><div>        }<\/div><div>        end_c_loop(c, t)<\/div><div>    }<\/div><div>}<\/div><p> <\/p><\/p>\n","protected":false},"template":"","class_list":["post-382170","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t