1、首先找个比较小的例子调试。将下列文本保存成udf.c/* This UDF is used to compute relative length scale in DES model*/#include "udf.h"#include "mem.h"#include "math.h"#include "stdio.h"DEFINE_ON_DEMAND(rls){ /*#if !RP_HOST*/Domain *domain=Get_Domain(1);Thread *c_thread;cell_t c;face_t f;Thread *tf;Node *node;int n,k,counter,i;real delx,dely,delz,deltamax,maxx=0,maxy=0,maxz=0;float x[8],y[8],z[8],temp;thread_loop_c(c_thread,domain) /*loops over all cell threads in domain*/{begin_c_loop(c,c_thread) /* loops over cells in a cell thread */{temp=C_K(c,c_thread);//1.0-pow((pow(C_K(c,c_thread)/deltamax,2.0/3.0)/(0.23+pow(C_K(c,c_thread)/deltamax,2.0/3.0))),4.5);C_UDMI(c,c_thread,0)=temp;Message("%E10.5",temp);}end_c_loop(c,c_thread)}}
2、设置memory，全设置为1。define→define function→memory
3、compile，知道保存的udf文件。define→define function→compile
4、comp坡纠课柩ile & load。define→define function→compile, 然后load
5、初始化initializtion。因为里面有C_K，所以要获取cell的湍动能
6、excute on demand。define→define function→excute on demand。就可以看到fluent的tui区域输出信息