{"id":161907,"date":"2021-09-03T11:17:01","date_gmt":"2021-09-03T11:17:01","guid":{"rendered":"\/forum\/forums\/topic\/regarding-udf\/"},"modified":"2022-04-01T07:12:08","modified_gmt":"2022-04-01T07:12:08","slug":"regarding-udf","status":"closed","type":"topic","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/topic\/regarding-udf\/","title":{"rendered":"Regarding UDF"},"content":{"rendered":"
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I am modelling an adsorption model for a zeolite column. The UDF for mass source term is:<\/p>\n

#include "udf.h"<\/p>\n

int ads;<\/p>\n

int domain_q_ads = 0;<\/p>\n

int domain_d_ads = 1;<\/p>\n

DEFINE_ADJUST(q_ads, domain)<\/p>\n

{<\/p>\n

   Thread *t;cell_t c; real dt;<\/p>\n

   thread_loop_c(t,domain){<\/p>\n

   begin_c_loop(c,t){<\/p>\n

      dt = RP_Get_Real("physical-time-step")<\/p>\n

      C_UDSI(c,t,0)=C_UDSI_M1(c,t,q_ads)<\/p>\n

      +0,15*dt*(C_UDSI_M1(c,t,ads)-C_UDSI_M1(c,t,q_ads));}<\/p>\n

   end_c_loop(c,t);}   <\/p>\n

}<\/p>\n

<\/p>\n<\/p>\n

DEFINE_ADJUST(d_ads, domain)<\/p>\n

{<\/p>\n

   Thread *t; cell_t c;<\/p>\n

   thread_loop_c(t,domain){<\/p>\n

      begin_c_loop(c,t)<\/p>\n

      {<\/p>\n

         C_UDSI(c,t,1)=-0,532224*0,15*<\/p>\n

         (C_UDSI(c,t,ads)-C_UDSI(c,t,q_ads));}<\/p>\n

      end_c_loop(c,t);<\/p>\n

   }   <\/p>\n

}<\/p>\n

DEFINE_SOURCE(m_src,c,t,dS,eqn)<\/p>\n

{<\/p>\n

   dS[eqn] = 0,0;<\/p>\n

   return C_UDSI_M1(c,t,d_ads);<\/p>\n

}<\/p>\n

When i try to compile, the console shows this error and the fluent window stopped working. I am allocating 2 memory location for UDM.<\/p>\n

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\n<\/a><\/p>\n","protected":false},"template":"","class_list":["post-161907","topic","type-topic","status-closed","hentry","topic-tag-fluent","topic-tag-fluid-dynamics","topic-tag-udf","topic-tag-udf-fluent"],"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\n\t\t\n\t\t\n\t\t