# Problem in "grid motion"

 User Name Remember Me Password
 Register Blogs Members List Search Today's Posts Mark Forums Read

 May 13, 2012, 13:44 Problem in "grid motion" #1 New Member   James Yuan Join Date: Apr 2012 Posts: 3 Rep Power: 7 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); }

 May 13, 2012, 13:48 #2 New Member   James Yuan Join Date: Apr 2012 Posts: 3 Rep Power: 7 please help me ~~~

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post ayhan515 OpenFOAM Meshing & Mesh Conversion 5 August 10, 2015 08:45 Wouter Fluent UDF and Scheme Programming 6 June 6, 2012 04:43 JFDC FLUENT 1 July 11, 2011 05:59 Se-Hee CFX 2 June 10, 2007 06:29 ParodDav CFX 5 April 29, 2007 19:13

All times are GMT -4. The time now is 06:11.

 Contact Us - CFD Online - Privacy Statement - Top