CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   Fluent UDF and Scheme Programming (http://www.cfd-online.com/Forums/fluent-udf/)
-   -   adjacent cells (neighbor cells) (http://www.cfd-online.com/Forums/fluent-udf/98462-adjacent-cells-neighbor-cells.html)

 onlyou1221 March 12, 2012 05:09

adjacent cells (neighbor cells)

Hi,
I want to obtain the adjacent cells of a cell (cells connected to each nodes not only faces), I loop over all cells, check to see if a cell shares any nodes with the cell of interest, and save a array of the ones that do. But I found taht the array (neighbourcell[Ncell][NeighC] in code) doesn't contain all the adjacent cells and I don't know why, please help me, thanks!
Code:

```#include "udf.h" #define Ncell 100000 /*number of cells*/ #define NeighC 26 /*maximun number of adjacent cells*/ cell_t c1,c2,neighbourcell[Ncell][NeighC]; Thread *t; int ii,jj,kk; DEFINE_INIT(init,domain) {  for(ii=0;ii<Ncell;ii++)   for(jj=0;jj<NeighC;jj++)   neighbourcell[ii][jj]=-1;  thread_loop_c(t,domain)  {   begin_c_loop(c1,t)/*loop_c1*/   {   kk=0;   begin_c_loop(c2,t)   {     for(ii=0;ii<C_NNODES(c1,t);++ii)     for(jj=0;jj<C_NNODES(c2,t);++jj)       if(C_NODE(c1,t,ii)==C_NODE(c2,t,jj))/*share Node;*/       {       neighbourcell[c1][kk]=c2;       kk++;       break;       }     if(C_NODE(c1,t,ii)==C_NODE(c,t,jj)) break;/*exit loop_c1*/   }   end_c_loop(c2,t)   }   end_c_loop(c1,t)  } }```

 All times are GMT -4. The time now is 11:01.