动网格UDF案例
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动网格UDF案例
问题运动
• 绿色的阀体作定速转动 • 黄色膜片作随时间做正/余
旋的变形 • 动网格区域
– 阀体—— DEFINE_CG_MOTION
– 膜片—— DEFINE_GRID_MOTION
– 上部壁面—— DEFINE_GEOM
DEFINE_CG_MOTION
• 阀体转动Βιβλιοθήκη Baidu
#define omega 1.0 DEFINE_CG_MOTION(butterfly_flex_UDF, dt, cg_vel,
DEFINE_GRID_MOTION(moving_arc, domain, dt, time, dtime)
{ Thread *tf = DT_THREAD (dt); face_t f; Node *node_p; real alpha, theta, x, ymag, yfull, y; int n;
cg_omega, time, dtime) { cg_vel[0] = 0.0; cg_vel[1] = 0.0; cg_vel[2] = 0.0;
cg_omega[0] = 0.0; cg_omega[1] = 0.0; cg_omega[2] = omega; }
DEFINE_GRID_MOTION
{ node_p = F_NODE (f, tf, n);
if (NODE_POS_NEED_UPDATE (node_p)) {
NODE_POS_UPDATED (node_p);
x = NODE_X (node_p); ymag = sqrt (R*R - x*x) + 0.03; yfull = ymag - 0.1; y = - 0.1 + yfull * sin(theta); NODE_Y (node_p) = y; } } } end_f_loop (f, tf); }
SET_DEFORMING_THREAD_FLAG (THREAD_T0 (tf));
alpha = omega * CURRENT_TIME; theta = 2.0 * alpha + 3.0 * M_PI / 2.0;
begin_f_loop (f, tf) { f_node_loop (f, tf, n)
DEFINE_GEOM
#define R 0.109 DEFINE_GEOM(plane, domain, dt, position) {
position[1] = R; }
问题运动
• 绿色的阀体作定速转动 • 黄色膜片作随时间做正/余
旋的变形 • 动网格区域
– 阀体—— DEFINE_CG_MOTION
– 膜片—— DEFINE_GRID_MOTION
– 上部壁面—— DEFINE_GEOM
DEFINE_CG_MOTION
• 阀体转动Βιβλιοθήκη Baidu
#define omega 1.0 DEFINE_CG_MOTION(butterfly_flex_UDF, dt, cg_vel,
DEFINE_GRID_MOTION(moving_arc, domain, dt, time, dtime)
{ Thread *tf = DT_THREAD (dt); face_t f; Node *node_p; real alpha, theta, x, ymag, yfull, y; int n;
cg_omega, time, dtime) { cg_vel[0] = 0.0; cg_vel[1] = 0.0; cg_vel[2] = 0.0;
cg_omega[0] = 0.0; cg_omega[1] = 0.0; cg_omega[2] = omega; }
DEFINE_GRID_MOTION
{ node_p = F_NODE (f, tf, n);
if (NODE_POS_NEED_UPDATE (node_p)) {
NODE_POS_UPDATED (node_p);
x = NODE_X (node_p); ymag = sqrt (R*R - x*x) + 0.03; yfull = ymag - 0.1; y = - 0.1 + yfull * sin(theta); NODE_Y (node_p) = y; } } } end_f_loop (f, tf); }
SET_DEFORMING_THREAD_FLAG (THREAD_T0 (tf));
alpha = omega * CURRENT_TIME; theta = 2.0 * alpha + 3.0 * M_PI / 2.0;
begin_f_loop (f, tf) { f_node_loop (f, tf, n)
DEFINE_GEOM
#define R 0.109 DEFINE_GEOM(plane, domain, dt, position) {
position[1] = R; }