# Help needed with UDF

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 October 25, 2005, 11:38 Help needed with UDF #1 sam Guest   Posts: n/a I want to move the cells on a wall normal to the cell surface in cylindrical co-ordinates for an unsymmetrical wall about the origin. Any help with the following UDF is highly appreciated. thanks, Samir #include "udf.h" DEFINE_GRID_MOTION(wall,domain,dt,time,dtime) { Thread *tf = DT_THREAD(dt); face_t f; Node *v; real NV_VEC(omega), NV_VEC(axis), NV_VEC(dx); real NV_VEC(origin), NV_VEC(rvec); real sign; int n; /* set deforming flag on adjacent cell zone */ SET_DEFORMING_THREAD_FLAG(THREAD_T0(tf)); sign = 0.66 * dt); Message ("time = %f, omega = %f\n", time, sign); NV_S(omega, =, 0.0); NV_D(axis, =, 1.0, 0.0, 1.0); NV_D(origin, =, 0.0, 0.0, 0.0); begin_f_loop(f,tf) { f_node_loop(f,tf,n) { v = F_NODE(f,tf,n); /* update node if x position is greater than 0.02 and that the current node has not been previously visited when looping through previous faces */ if (NODE_X(v) > 0.020 && NODE_POS_NEED_UPDATE (v)) { /* indicate that node position has been update so that it's not updated more than once */ NODE_POS_UPDATED(v); omega[1] = sign; NV_VV(rvec, =, NODE_COORD(v), -, origin); NV_CROSS(dx, omega, rvec); NV_S(dx, *=, dtime); NV_V(NODE_COORD(v), +=, dx); } } } end_f_loop(f,tf); }

 October 25, 2005, 13:45 urgent query #2 zubier Guest   Posts: n/a hi all would you please send me tutorial of case file and solution file of how to simulate the electrical field in cylidrical pipe of flowing fluid. iam highly appreciate your help thanks regard

 October 25, 2005, 23:06 Re: Help needed with UDF #3 Md. Tajul Islam Guest   Posts: n/a I need a C code UDF for fluent for slip boundary condition microflow when the Knudsen number<=0.1. Help from anyone is apreciated. Tajul

 October 25, 2005, 23:09 Re: urgent query *NM* #4 Md. Tajul Islam Guest   Posts: n/a

 October 26, 2005, 02:42 Re: urgent query #5 zubier Guest   Posts: n/a Dear MR MOHAMMAD TAJUL ISLAM how are u and ramadan kareem i didn't recieve your reply regarding my qustion in my previus massage hope u send it again thanks

 October 26, 2005, 02:48 Re: urgent query #6 Md. Tajul Islam Guest   Posts: n/a As salam. I am not expert in this regard. My posting was a mistake.

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