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ÎÒÄ£ÄâµÄÈë¿ÚËÙ¶ÈËæÊ±¼ä±ä»¯£¬Í¬Ê±ÊÇÅ×ÎïÏß·Ö²¼¡£u=1.5*£¨2y-y*y£©*[1+0.05*sin£¨169.56*t£©].µ«ÎÒ±àдµÄÒ»Ö±³ö´í£¬Çë´ó¼Ò°ïÎÒ¿´¿´£¬Äܲ»ÄܰïÎÒ°ÑÕýÈ·µÄUDFдÏÂÀ´£¬·Ç³£¸Ðл¡£
#include "udf.h"

DEFINE_PROFILE(unsteady_velocity,thread,position)
{
        real x[ND_ND];
        real y;
        real t=RP_Get_Real("flow-time";
        face_t f;


        begin_f_loop(f,thread)
        {
                F_CENTROID(x,f,thread);
                y=x[1];
                F_PROFILE(f,thread,position)=1.5*(2*y-2*y*y)*[1+0.05*sin(169.56*t)];
        }
        end_f_loop(f,thread)
}
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