CFD Online Discussion Forums

Hi,
I study nanofluids and I use mixture model. There are two phases:
solid particular and liquid phase. I want to modify effective
thermal conductivity. I have writen an UDF. I want udf to use
constant experimantal efective thermal conductivity(C_K_EFF). when I
interprete, there is an error: invalid lvalue in
assignment(C_K_EFF(c,mix_thread,prt)=0.63;). which macro should I use? Here is the udf:

DEFINE_ADJUST(myudf, mix_domain)

{

Thread *mix_thread;

Thread **pt;

cell_t c;

real prt;

mp_thread_loop_c(mix_thread, mix_domain, pt)

{ begin_c_loop(c, mix_thread)

{

C_K_EFF=(c, mix_thread,prt)=0.63;

}

end_c_loop(c, mix_thread)

}

}