C_UDSI_G() use in DEFINE_ADJUST
 

Hi, I found a solution for the archived post below. Here an example for C_UDSI_G() use in DEFINE_ADJUST

real my_mag = 0.0;

thread_loop_c (t,domain)

{

if (NULL != THREAD_STORAGE(t,SV_UDS_I(uds_index)) &&

NULL != T_STORAGE_R_NV(t,SV_UDSI_G(uds_index)))

{

begin_c_loop (c,t)

{

my_mag = NV_MAG(C_UDSI_G(c,t,uds_index));

}

end_c_loop (c,t)

}

}

-----------ARCHIVED POST------------

When I use a C_UDSI_G in DEFINE_ADJUST, the access_violation error came out.

if I start iteration without hooking the adjust fuction,the iteration executed ,after some steps, I hooked the adjust function and initialized ,the iteration continues . I guess this is because the gradient of C_UDSI(C_UDSI_G ) isn't allocated yet ,but the codes do contain the if (! Data_Valid_P())return; sentence?

I check the id.h in the src file as: FLUENT_EXPORT boolean Data_Valid_P(void); The FLUENT_EXPORT usually provides a GUI operation interface.am i right?

can some one give me some suggestion that how to let Fluent iterate when hooked a adjust function which contains C_UDSI_G other then let it iterate some step without hooking this adjust function? and the reason for this? thanks in advance

----------------------------

I have the same problem to solve a transient problem. I guess you are right that C_UDSI_G needs couple of timesteps to be allocated.

It turns out no more than 4 timesteps works for me. The reason for that is unknown and I cannot find explaination in UDF manual. But anyway, just don't use the serveral inital timesteps. This may work.:cool: