Problem in "grid motion"
I want to simulate about a kind of airfoil in the fluent. the motion of this airfoil is flexible. So i am told that the "rigid body" cannot be used. So i use the user defined and use the function of "define grid motion".But i can hardly see the wall moved when i click the display zone motion.
so... please help me. here is my udf file.and that is my only udf files, did i need to use another function to identify the "THREAD"???? help me~~~ #include "udf.h" #include "dynamesh_tools.h" DEFINE_GRID_MOTION(udf, domain, dt, time, dtime) { face_t f; Thread *tf; /* pointer to a thread*/ real NV_VEC (omega), NV_VEC (axis), NV_VEC (dx); real NV_VEC (origin), NV_VEC (rvec); int n; Node *v; real sign,x,y,z,p; tf=DT_THREAD(dt); /* set deforming flags */ SET_DEFORMING_THREAD_FLAG (THREAD_T0(tf)); sign = sin (time); Message ("time = %f, omega = %f\n", time, sign); NV_S (omega, =, 0.0); NV_D (axis, =, 0.0, 1.0, 0.0); NV_D (origin, =, 0.0, 0.0, 0.152); begin_f_loop (f, tf) { f_node_loop (f, tf, n) { v = F_NODE (f, tf, n); y=NODE_Y(v); x=NODE_X(v); if(x<0.3) { if(NODE_POS_NEED_UPDATE(v)) { NODE_POS_UPDATED(v); y =sign *(0.01*x+3.8*sin(0.3768*x)+3.5+2*cos(0.5652*x)); NV_VV (rvec, =, NODE_COORD (v), , origin); NV_S (dx, *=, dtime); NV_V (NODE_COORD (v), +=, dx); } } } } end_f_loop (f, tf); } 
please help me ~~~

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