{"id":372494,"date":"2024-07-18T08:27:11","date_gmt":"2024-07-18T08:27:11","guid":{"rendered":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/372494\/"},"modified":"2024-07-18T08:27:11","modified_gmt":"2024-07-18T08:27:11","slug":"372494","status":"publish","type":"reply","link":"https:\/\/innovationspace.ansys.com\/forum\/forums\/reply\/372494\/","title":{"rendered":"Reply To: UDF loading error"},"content":{"rendered":"<p>&lt;p&gt;Yes its a 2D case and I am lunching fluent in 2d. I have tried two code I know used to work (3 weeks ago) here is one of them taken from GitHub:&nbsp;&lt;\/p&gt;&lt;p&gt;&nbsp;&lt;\/p&gt;&lt;p&gt;#include &#8220;udf.h&#8221;&lt;\/p&gt;&lt;p&gt;#define T_max &nbsp; 4&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;\/*Flow time in s when the morphing stops*\/&lt;br&gt;#define W_te &nbsp; &nbsp;0.001*0.2286 &nbsp; &nbsp; &nbsp; &nbsp; \/*Maximum flap deflection*\/&lt;br&gt;#define x_s &nbsp; &nbsp; 0.75*0.2286 &nbsp; &nbsp; &nbsp; &nbsp; \/*location where the morphing starts*\/&lt;br&gt;#define Thick &nbsp; 0.12 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;\/*Airfoil thickness 12\/100 in NACA 0012*\/&lt;br&gt;#define freq &nbsp; &nbsp;100 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \/*Morphing frequency*\/&lt;br&gt;#define FTT &nbsp; &nbsp; 0.004&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \/*Time in s when the moprhing starts*\/&lt;br&gt;#define chord &nbsp; 0.2286 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;\/*Airfoil chord*\/&lt;\/p&gt;&lt;p&gt;DEFINE_GRID_MOTION(morphing_upper, domain, dt, time, dtime)&lt;br&gt;{&lt;br&gt;&nbsp; Thread *tf = DT_THREAD(dt);&lt;br&gt;&nbsp; face_t f;&lt;br&gt;&nbsp; Node *node_p;&lt;br&gt;&nbsp; real x, y, thickness, camber, theta, yupper, dy_c, slope, xupper;&lt;br&gt;&nbsp; int n;&lt;\/p&gt;&lt;p&gt;&nbsp; \/* Set\/activate the deforming flag on adjacent cell zone, which *\/&lt;br&gt;&nbsp; \/* means that the cells adjacent to the deforming wall will also be *\/&lt;br&gt;&nbsp; \/* deformed, in order to avoid skewness. *\/&lt;br&gt;&nbsp; SET_DEFORMING_THREAD_FLAG(THREAD_T0(tf));&lt;\/p&gt;&lt;p&gt;&nbsp; \/* Loop over the deforming boundary zone&#8217;s faces; *\/&lt;br&gt;&nbsp; \/* inner loop loops over all nodes of a given face; *\/&lt;br&gt;&nbsp; \/* Thus, since one node can belong to several faces, one must guard *\/&lt;br&gt;&nbsp; \/* against operating on a given node more than once: *\/&lt;\/p&gt;&lt;p&gt;&nbsp; begin_f_loop(f, tf)&lt;br&gt;&nbsp; {&lt;br&gt;&nbsp; &nbsp; f_node_loop(f, tf, n)&lt;br&gt;&nbsp; &nbsp; {&lt;br&gt;&nbsp; &nbsp; &nbsp; node_p = F_NODE(f, tf, n);&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; \/* Update the current node only if it has not been *\/&lt;br&gt;&nbsp; &nbsp; &nbsp; \/* previously visited: *\/&lt;br&gt;&nbsp; &nbsp; &nbsp; if (NODE_POS_NEED_UPDATE(node_p))&lt;br&gt;&nbsp; &nbsp; &nbsp; {&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; \/* Set flag to indicate that the current node&#8217;s *\/&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; \/* position has been updated, so that it will not be *\/&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; \/* updated during a future pass through the loop: *\/&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; NODE_POS_UPDATED(node_p);&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; &nbsp; x = NODE_X(node_p);&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; thickness = (chord * Thick \/ 0.2) * (0.2969 * sqrt(x \/ chord) &#8211; 0.1260 * x \/ chord &#8211; 0.3516 * pow((x \/ chord), 2) + 0.2843 * pow((x \/ chord), 3) &#8211; 0.1036 * pow((x \/ chord), 4));&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; &nbsp; if (CURRENT_TIME &gt; FTT)&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; {&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (x &gt;= x_s)&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; camber = -(W_te * sin(2 * M_PI * (CURRENT_TIME &#8211; FTT) * freq) * pow((x &#8211; x_s), 3)) \/ (pow((chord &#8211; x_s), 3));&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; dy_c = (-3 * W_te * sin(2 * M_PI * (CURRENT_TIME &#8211; FTT) * freq) * pow((x &#8211; x_s), 2)) \/ (pow((chord &#8211; x_s), 3));&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; theta = atan((-3 * W_te * sin(2 * M_PI * (CURRENT_TIME &#8211; FTT) * freq)) * pow((x &#8211; x_s), 2) \/ (pow((chord &#8211; x_s), 3)));&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xupper = x &#8211; thickness * sin(theta);&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; yupper = camber + thickness * cos(theta);&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; NODE_Y(node_p) = yupper;&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; }&lt;br&gt;&nbsp; &nbsp; &nbsp; }&lt;br&gt;&nbsp; &nbsp; }&lt;br&gt;&nbsp; }&lt;br&gt;&nbsp; end_f_loop(f, tf);&lt;br&gt;}&lt;br&gt;DEFINE_GRID_MOTION(morphing_lower, domain, dt, time, dtime)&lt;br&gt;{&lt;br&gt;&nbsp; &nbsp; Thread* tf = DT_THREAD(dt);&lt;br&gt;&nbsp; &nbsp; face_t f;&lt;br&gt;&nbsp; &nbsp; Node* node_p;&lt;br&gt;&nbsp; &nbsp; real &nbsp;x, y, thickness, camber, theta, lower, dy_c, xlower, slope;&lt;br&gt;&nbsp; &nbsp; int n;&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; \/* Set\/activate the deforming flag on adjacent cell zone, which &nbsp; &nbsp; &nbsp;*\/&lt;br&gt;&nbsp; &nbsp; \/* means that the cells adjacent to the deforming wall will also be &nbsp;*\/&lt;br&gt;&nbsp; &nbsp; \/* deformed, in order to avoid skewness. &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; *\/&lt;br&gt;&nbsp; &nbsp; SET_DEFORMING_THREAD_FLAG(THREAD_T0(tf));&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; \/* Compute the angles: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; *\/&lt;br&gt;&nbsp; &nbsp; \/* Loop over the deforming boundary zone&#8217;s faces; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;*\/&lt;br&gt;&nbsp; &nbsp; \/* inner loop loops over all nodes of a given face; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;*\/&lt;br&gt;&nbsp; &nbsp; \/* Thus, since one node can belong to several faces, one must guard &nbsp;*\/&lt;br&gt;&nbsp; &nbsp; \/* against operating on a given node more than once: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; *\/&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; begin_f_loop(f, tf)&lt;br&gt;&nbsp; &nbsp; {&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; f_node_loop(f, tf, n)&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; {&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; node_p = F_NODE(f, tf, n);&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \/* Update the current node only if it has not been &nbsp; &nbsp; &nbsp; &nbsp; *\/&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \/* previously visited: &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; *\/&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (NODE_POS_NEED_UPDATE(node_p))&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; {&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \/* Set flag to indicate that the current node&#8217;s &nbsp; &nbsp; &nbsp; &nbsp;*\/&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \/* position has been updated, so that it will not be &nbsp; *\/&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; \/* updated during a future pass through the loop: &nbsp; &nbsp; &nbsp;*\/&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; NODE_POS_UPDATED(node_p);&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; x = NODE_X(node_p);&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; thickness = (chord * Thick \/ 0.2) * (0.2969 * sqrt(x \/ chord) &#8211; 0.1260 * x \/ chord &#8211; 0.3516 * pow((x \/ chord), 2) + 0.2843 * pow((x \/ chord), 3) &#8211; 0.1036 * pow((x \/ chord), 4));&lt;\/p&gt;&lt;p&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (CURRENT_TIME &gt; FTT) {&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; if (x &gt;= x_s) {&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; camber = -(W_te * sin(2 * M_PI * ((CURRENT_TIME &#8211; FTT) * freq)) * pow((x &#8211; x_s), 3)) \/ (pow((chord &#8211; x_s), 3));&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; dy_c = (-3 * W_te * sin(2 * M_PI * (CURRENT_TIME &#8211; FTT) * freq)) * pow((x &#8211; x_s), 2) \/ (pow((chord &#8211; x_s), 3));&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; theta = atan((-3 * W_te * sin(2 * M_PI * (CURRENT_TIME &#8211; FTT) * freq)) * pow((x &#8211; x_s), 2) \/ (pow((chord &#8211; x_s), 3)));&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; slope = sin(theta);&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; xlower = x + thickness * slope;&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; lower = camber &#8211; thickness * cos(theta);&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; NODE_Y(node_p) = lower;&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; }&lt;br&gt;&nbsp; &nbsp; &nbsp; &nbsp; }&lt;br&gt;&nbsp; &nbsp; }&lt;br&gt;&nbsp; &nbsp; end_f_loop(f, tf);&lt;br&gt;}&lt;\/p&gt;<\/p>\n","protected":false},"template":"","class_list":["post-372494","reply","type-reply","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Yes its a 2D case and I am lunching fluent in 2d. 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